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a, 5x - 16 = 41 + x
=> 5x - x = 41 + 16
=> 4x = 57
=> x = \(\frac{57}{4}\)
Vậy x = \(\frac{57}{4}\)
b) 4x - 1 =15 - x
=> 4x + x = 15 + 1
=> 5x = 16
=> \(x=\frac{16}{5}\)
Vậy \(x=\frac{16}{5}\)
c, x - 15 = 6 + 4x
=> -15 - 6 = 4x - x
=> 3x = - 21
=> x = -7
Vậy x = - 7
Có j sai mong bỏ qua
5x.(-x)2+1=6
5x.x+1=6
5x2+1=6
5x2=6-1
5x2=5
x2=5:5
x2=1
x2=12
=>x=1
(15-x)+(x-12)=7-(-8+x)
15-x+x-12=7+8-x
3-x+x=15-x
3=15-x
x=15-3
x=12
4x3=4x
Để 4x3=4x=>x3=x
=>x=1
Câu cuối cùng mình ko bik.
hoc tốt
a, vì : 32 = 9
=> x - 6 = 3
=> x = 9
b, 720 : [ 41 - ( 2x - 5 ) ] = 40
41 - ( 2x - 5 ) = 720 : 40 = 18
2x - 5 = 41 - 18 = 23
2x = 23 + 5 = 28
x = 28 : 2 = 14
c, ( 4x + 28 ) . 3 + 55 = 35 . 5 = 175
( 4x + 28 ) . 3 = 175 - 55 = 120
4x + 28 = 120 : 3 = 40
4x = 40 - 28 = 12
x = 12 : 4 = 3
**** GIÙM MK NHA , TKS
\(1,\Leftrightarrow7x=42\Leftrightarrow x=6\\ 2,\Leftrightarrow36-4x=4\Leftrightarrow4x=32\Leftrightarrow x=8\\ 3,\Leftrightarrow3x=35\Leftrightarrow x=\dfrac{35}{3}\\ 4,\Leftrightarrow x-12=144\Leftrightarrow x=156\\ 5,\Leftrightarrow x-14=16\Leftrightarrow x=30\\ 6,\Leftrightarrow3x-24=\dfrac{148}{73}\Leftrightarrow3x=\dfrac{1900}{73}\Leftrightarrow x=\dfrac{1900}{219}\\ 7,\Leftrightarrow33+x=45\Leftrightarrow x=12\\ 8,Sai.đề\\ 9,\Leftrightarrow\left(x+9\right):2=39\Leftrightarrow x+9=78\Leftrightarrow x=69\\ 11,\Leftrightarrow2\left(x+7\right)=38\Leftrightarrow x+7=19\Leftrightarrow x=12\\ 13,\Leftrightarrow2\left(x-51\right)=66\Leftrightarrow x-51=33\Leftrightarrow x=84\)
\(15,\Leftrightarrow x-19=9\Leftrightarrow x=28\\ 17,\Leftrightarrow\left(x-3\right):2=48\Leftrightarrow x-3=96\Leftrightarrow x=99\\ 19,\Leftrightarrow0x=46\Leftrightarrow x\in\varnothing\\ 8,Sai.đề\\ 14,\Leftrightarrow2x=209\Leftrightarrow x=\dfrac{209}{2}\\ 16,\Leftrightarrow2x+6=157\Leftrightarrow2x=151\Leftrightarrow x=\dfrac{151}{2}\\ 18,\Leftrightarrow5\left(x+4\right)=100\Leftrightarrow x+4=20\Leftrightarrow x=16\\ 20,\Leftrightarrow\left(3x-5\right)^3=27=3^3\Leftrightarrow3x-5=3\Leftrightarrow x=\dfrac{8}{3}\)
a. - 7 - 9 = - (7 + 9) = - 16
b. - 15 - 8 = - (15 + 8) = - 23
c. - 28 - 32 = - (28 + 32) = - 60
d. - 43 - 32 = - (43 + 32) = - 75
e. - 5 - 9 - 11
= - (5 + 9 + 11)
= - (14 + 11)
= - 25
f. - 6 - 8 - 13
= - (6 + 8 + 13)
= - (14 + 13)
= - 27
g. - 3 - 7 - 25
= - (3 + 7 + 25)
= - (10 + 25)
= - 35
h. - 7 - 4 - 15
= - (7 + 4 + 15)
= - (11 + 15)
= - 26
6.4\(x\).41 + 4\(^x\).4\(^3\) = 28.(7 + 15)
4\(^x\).(6.4 + 43) = 28.22
4\(^x\).(24 + 64) = 256.22
4\(^x\). 88 = 5632
4\(^x\) = 532 : 88
4\(^x\) = 64
4\(^x\) = 43
\(x\) = 3