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a/ \(3636\div\left(12x-91\right)=36\)
\(12x-91=3636\div36\)
\(12x-91=101\)
\(12x=101+91\)
\(12x=192\)
\(x=192\div12\)
\(x=16\)
b/ \(\left(x\div23+45\right)\times67=8911\)
\(x\div23+45=8911\div67\)
\(x\div23+45=133\)
\(x\div23=133+45\)
\(x\div23=178\)
\(x=178\times23\)
\(x=4094\)
a. 3636 : (12x - 91) = 36
=> 12x - 91 = 3636 : 36
=> 12x - 91 = 101
=> 12x = 101 + 91
=> 12x = 192
=> x = 192 : 12
=> x = 16
b. (x : 23 + 45). 67 = 8911
=> x : 23 + 45 = 8911 : 67
=> x : 23 + 45 = 133
=> x : 23 = 133 - 45
=> x : 23 = 88
=> x = 88 . 23
=> x = 2024
c. (19x + 2.52) : 14 = (13 - 8)2 - 4
=> (19x + 2.25) : 14 = 52 - 4
=> (19x + 50) : 14 = 25 - 4
=> (19x + 50) : 14 = 21
=> 19x + 50 = 21. 14
=> 19x + 50 = 294
=> 19x = 294 - 50
=> 19x = 244
=> x = 244 : 19
=> x = 244/19 (Xem lại đề)
d. -12 .(x - 5) + 7.(3 - x) = 5
=> -12x + 60 + 21 - 7x = 5
=> -19x + 81 = 5
=> -19x = 5 - 81
=> -19x = -76
=> x = -76 : (-19)
=> x = 4
a) (x + 74) - 318 = 200
x + 74 = 200 + 318
x + 74 = 518
x = 518 - 74
x = 444
b) 3636 : (12x - 91) = 36
12x - 91 = 3636 : 36
12x - 91 = 101
12x = 101 + 91
12x = 192
x = 192 : 12
x = 16
c) (x : 23 + 45) . 67 = 8911
x : 23 + 45 = 8911 : 67
x : 23 + 45 = 133
x : 23 = 133 - 45
x : 23 = 88
x = 88 . 23
x = 2024
minh lam lun ko ghi lai de
a, 12x-91=3636:36
12x=101+91
x= 192:12
x=16
b, x:23+45=8911:67
x:23=133-45
x=88.23
x=2024
k mk nha
câu 1:
3636:(12*x-91)= 36
12*x-91=3636:36
12*x-91=101
12*x =101 + 91
12*x =192
x =192 : 12
x =16
câu 2:
(x:23+45)*67=8911
x:23+45 =8911 : 67
x:23+45 =133
x:23 =133 - 45
x:23 = 88
x = 88*23
x =2024
a) 3636:(12x-91) =36
12x-91 = 3636:36
12x-91=101
12x=101+91
12x=192
x=192:12
x=16
b) (x : 23+45).67=8911
(x : 23+45)=8911:67
(x : 23+45)=133
x:23=133-45
x:23=88
x=88.23
x=2024
c) 420+65.4 =(x+175):5+30
420+260=(x+175):5+30
680=(x+175):5+30
(x+175):5=680-30
(x+175):5=650
(x+175)=650x5
(x+175)=3250
x=3250-175
x=3075
d) (32.15):2=(x+70):14-10
480:2=(x+70):14-10
240=(x+70):14-10
(x+70):14=240+10
(x+70):14=250
(x+70)=250.14
(x+70)=3500
x=3500-70
x=3430
e)x-4867=(175.2-50.70):25+23
x-4867=(350-3500):25+23
x-4867=-3150:25+23
x-4867=-126+23
x-4867=-103
x=-103+4867
x=4764
\(a,\Rightarrow12x-91=101\\ \Rightarrow12x=192\\ \Rightarrow x=16\\ b,\Rightarrow x:23+45=133\\ \Rightarrow x:23=88\\ \Rightarrow x=\dfrac{88}{23}\\ c,\Rightarrow\left(6x-39\right):7=3\\ \Rightarrow6x-39=21\\ \Rightarrow6x=60\\ \Rightarrow x=10\\ d,\Rightarrow3x-24=\dfrac{148}{73}\\ \Rightarrow3x=\dfrac{1900}{73}\\ \Rightarrow x=\dfrac{1900}{219}\\ e,\Rightarrow\left[{}\begin{matrix}x=0\\x=10\end{matrix}\right.\\ f,\Rightarrow\left[{}\begin{matrix}x=-1\\x=2\end{matrix}\right.\\ d,\left(9-x\right)^3=64=4^3\\ \Rightarrow9-x=4\\ \Rightarrow x=5\\ h,\Rightarrow x=27\\ i,\Rightarrow6x=312\cdot12=624\cdot6\\ \Rightarrow x=624\\ j,\Rightarrow\left(19x+104\right):14=25-42=-17\\ \Rightarrow19x+104=-238\\ \Rightarrow19x=-342\\ \Rightarrow x=-18\)
a ) \(\left(x+74\right)-318=200\)
\(\left(x+74\right)=200+318\)
\(x+74=518\)
\(x=518-74\)
\(x=444\)
Vậy \(x=444\)
b ) \(3636:\left(12x-91\right)=36\)
\(\left(12x-91\right)=3636:36\)
\(12x-91=101\)
\(12x=101+91\)
\(12.x=192\)
\(x=192:12\)
\(x=16\)
Vậy \(x=16\)
c ) \(\left(x:23+45\right).67=8911\)
\(\left(x:23+45\right)=8911:67\)
\(x:23+45=133\)
\(x:23=133-45\)
\(x:23=88\)
\(x=88.23\)
\(x=2024\)
Vậy \(x=2024\)
Chúc bạn học tốt !!!
3636: ( 12x-91) = 36
12x-91 =3636:36
12x-91 =101
12x =101+91
12x =192
x =192:12
x =16
( x : 23 + 45 ) x 67 = 8911
x : 23 + 45 =8911:67
x : 23 + 45 =133
x:23 =133-45
x:23 =88
x =88x23
x =2024
bạn tự suy nghĩ nhé,mik bận học rùi
x=16
x=2024
x=....