Làm giúp nha ! hứa thick ạk
a. 420 + 65 .4 = ( x + 175 ) : 5 + 30
[(x+32)-17].2=42
b. ( 32.15) : 2 = ( x+70): 14-40
[ 61 + ( 53-x)] .17=1785
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Cau a các bạn đã làm mình làm câu b , c nhé
420 + 65 x 24 = (x+175) : 5 +30
1980 = (x+175) : 5 + 30
(x+175):5 = 1950
x+175 = 390
x = 215
7 x X - 24 = 5x X
=> 7 x X - 5 x X = 24
2x = 24
=> x = 12
420 + 65 . 4 = ( x + 175 ) : 5 + 30
=> ( x + 175 ) : 5 + 30 = 420 + 45 . 4
=> ( x + 175 ) : 5 + 30 = 600
=> ( x + 175 ) : 5 = 600 - 30
=> ( x + 175 ) : 5 = 570
=> x + 175 = 570 . 5
=> x + 175 = 2850
=> x = 2850 - 175
=> x = 2675
nha bn
các câu khác tương tự nhé
nhớ ủng hộ mik nha mn
\(\text{Tìm x hở e????}\)
~~~~~~~~~
\(\text{420 + 65 . 4 = ( x + 175 ) : 5 + 30}\)
\(420+260=\left(x+175\right):5+30\)
\(680=\text{ ( x + 175 ) : 5 + 30}\)
\(\text{ ( x + 175 ) : 5 + 30=680}\)
\(\text{ ( x + 175 ) : 5 =680-30}\)
\((x+175):5=650\)
\(x+175=650:5\)
\(x+175=130\)
\(x=130-175\)
\(x=-45\)
\(\text{(32.15) : 2 = (x + 70) : 14 - 40}\)
\(480:2=\text{ (x + 70) : 14 - 40}\)
\(240\text{ = (x + 70) : 14 - 40}\)
\(\text{ (x + 70) : 14 =280}\)
\(x+70=3920\)
\(x=3920-70\)
\(x=3850\)
\(\text{x - 4867 = ( 175 . 2050 . 76) + 25 + 23}\)
\(\text{x - 4867 = ( 175 . 2050 . 76) + 48}\)
\(x-4867=27265000+48\)
\(x-4867=27265048\)
\(x=27265048+4867\)
\(x=27260015\)
\(\text{Hok giỏi nhé!~!!}\)
a, \(420+65:4=\left(x+175\right):5+30\)
\(\Rightarrow\left(x+175\right):5+30=420+16,25\)
\(\Rightarrow\left(x+175\right):5=420+16,25-30=406,25\)
\(\Rightarrow x+175=2031,25\)
\(\Rightarrow x=1856,25\)
b, \(\left(32.15\right):2=\left(x+70\right):14-40\)
\(\Rightarrow\left(x+70\right):14-40=480:2\)
\(\Rightarrow\left(x+70\right):14=240+40=280\)
\(\Rightarrow x+70=3920\Rightarrow x=3850\)
c, \(x-4867=\left(175.2050.70\right):25+23\)
\(\Rightarrow x=39462500:25+23+4867\)
\(\Rightarrow x=1578500+23+4867=1583390\)
Chúc bạn học tốt!!!
x - 4867 = (175.2050.70):25 + 24
x - 4867 = 251125:25 + 24
x - 4867 = 1004500 +24
x = 1004500 + 24 + 4867
x = 1009391
a ) 420 + 65 . 4 = ( x + 175 ) : 51 + 30
420 + 260 = ( x + 175 ) : 51 + 30
680 = ( x + 175 ) : 51 + 30
=> ( x + 175 ) : 51 = 680 - 30
( x + 175 ) : 51 = 650
x + 175 = 650 . 51
x + 175 = 33150
x = 33150 - 175
x = 32975
b ) ( 32 . 15 ) : 2 = ( x + 70 ) : 14 - 40
480 : 2 = ( x + 70 ) : 14 - 40
240 = ( x + 70 ) : 14 - 40
=> ( x + 70 ) : 14 = 240 + 40
( x + 70 ) : 14 = 280
x + 70 = 280 . 14
x + 70 = 3920
x = 3920 - 70
x = 3850
a){720:[41-(7.2\(^2\)- X)] }:(2\(^3\).5)=1
{720:[41-(7.4-X)] }:(8.5)=1
{720:[41-(28-X)] }:40=1
41-(28-X):40=1.720
41-(28-X):40=720
(28-X):40=720+41
(28-X):40=716
28-X =716.40
28-X=28640
X=28-28640
X=(-28612)
b)420+65.4=(x+175):5+30
420+260=(x+175):5+30
280=(x+175):5+30
(x+175):5=280-30
(x+175):5=250
x+175=250.5
x+175=1250
x=1250-175
x=1075
c)(32.15):2=(x+70):14-40
480:2=(x+70):14-40
240=(x+70):14-40
(x+70):14=240+40
(x+70):14=280
x+70=280.14
x+70=3920
x=3920-70
x=3850
\(a,\Rightarrow6x+70=130\Rightarrow6x=60\Rightarrow x=10\\ b,\Rightarrow240=\left(x+70\right):14-40\\ \Rightarrow\left(x+70\right):14=280\\ \Rightarrow x+70=3920\Rightarrow x=3850\\ c,\Rightarrow x-15=75\Rightarrow x=90\\ d,\Rightarrow\left(x+175\right):5=680-30=650\\ \Rightarrow x+175=3250\Rightarrow x=3075\\ e,\Rightarrow x-4867=1004523\Rightarrow x=1009390\\ f,\Rightarrow x+32-17=24\Rightarrow x=9\\ g,\Rightarrow3\left(x+1\right)=54\Rightarrow x+1=18\Rightarrow x=17\\ h,\Rightarrow19\left(35:x+3\right)=152\\ \Rightarrow35:x+3=8\Rightarrow35:x=11\Rightarrow x=\dfrac{35}{11}\)
a) 420 + 65 . 4 = ( x + 175 ) : 5 + 30
680 = ( x + 175 ) : 5 + 30
( x + 175 ) : 5 = 680 - 30
( x + 175 ) : 5 = 650
x + 175 = 650 . 5
x + 175 = 3250
x = 3250 - 175
x = 3075
Những câu sau làm giống vậy
a.420 + 65 . 4 = ( x + 175 ) : 5 + 30
680 = ( x + 175 ) : 5 + 30
( x + 175 ) : 5 = 680 - 30
( x + 175 ) : 5 = 650
x + 175 = 650 x 5
x + 175 = 3250
x = 3250 - 175
x = 3075
[ ( x + 32 ) - 17 ] . 2 = 42
[ ( x + 32 ) - 17 ] = 42 : 2
( x + 32 ) - 17 = 21
( x + 32 ) = 21 + 17
x + 32 = 38
x = 38 - 32
x = 6
b. ( 32 . 15 ) : 2 = ( x + 70) : 14 - 40
240 = ( x + 70 ) : 14 - 40
( x + 70 ) : 14 = 240 + 40
( x + 70 ) : 14 = 280
( x + 70 ) = 280 . 14
x + 70 = 3820
x = 3920 - 70
x = 3850