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(3x - 6) + 9 = 34 . 3
(3x - 6) + 9 = 35
(3x - 6) + 9 = 243
3x - 6 = 243 - 9
3x - 6 = 234
3x = 234 + 6
3x = 240
x = 240 : 3
x = 80
Vậy x = 80.
96 + 3 . (x - 1) = 42
3 . (x - 1) = 42 - 96
3 . (x - 1) = -54
x - 1 = -54 : 3
x - 1 = -18
x = -18 + 1
x = -17
Vậy x = -17
a,x=80
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a. 3.x+7=25
<=> 3x = 18
<=> x = 6
b. (5.x+4)-1=23
<=> 5x + 4 = 24
<=> 5x = 20
<=> x = 4
c. 96-3(x+1)=42
<=> 3(x + 1) = 54
<=> x + 1 = 18
<=> x = 17
d. 2x=16
<=> 2x = 24
<=> x = 4
e. x2=16
<=> \(\orbr{\begin{cases}x^2=4^2\\x^2=\left(-4\right)^2\end{cases}}\)
<=> x = \(\pm\)4
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96-3.(x+1)=42
=> 3.(x+1)=96-42
=> 3.(x+1)=54
=> x+1=54:3
=> x+1=18
=> x=18-1
=> x=17
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96-3(x+1)=42
3(x+1)=96-42
3(x+1)=54
x+1=54-1
x+1=53
x=52
nha bn
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\(96-3\left(x+1\right)=42\)
\(96-\left(3x+3\right)=42\)
\(96-3-3x=42\)
\(93-3x=42\)
\(3x=51\Rightarrow x=17\)
tik mik nha !!!
96 - 3 ( x+1 ) = 42
=>3( x + 1 )= 96 - 42
=> 3( x + 1) = 54
=> x+1 = 54 : 3
=> x + 1 = 18
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96 - 3(x + 1) = 42
3(x + 1) = 96 - 42 = 54
x + 1 = 54 : 3 = 18
x = 18 - 1
x = 17
đề bài có đúng k z bạn