40-3x+7x=4

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Solution for 40-3x+7x=4 equation: 



40-3x+7x=4

We move all terms to the left:

40-3x+7x-(4)=0

We add all the numbers together, and all the variables

4x+36=0

We move all terms containing x to the left, all other terms to the right

4x=-36

x=-36/4

x=-9

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