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How to solve 3x = 40
3x-4 / 4 = 40
1 / 4 x = 40
x=40*4
x=160
5 x + 17-4 3x-7 = - 2
(x+17)/5-(3x-7)/4=-2
Multiply both sides of the equation by 20
4(x+17)-5(3x-7)=-40
11x=143
x=13
5 x + 17 - 4 3x-7 = - 2
If you multiply the left and right sides by 20, it will change to 4x + 340-15x-140 = - 40, and then continue to simplify the one variable linear equation, right? - 11x = - 240, x = - 240 / 11
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