115=4x+5x+7

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Solution for 115=4x+5x+7 equation: 



115=4x+5x+7

We move all terms to the left:

115-(4x+5x+7)=0

We add all the numbers together, and all the variables

-(9x+7)+115=0

We get rid of parentheses

-9x-7+115=0

We add all the numbers together, and all the variables

-9x+108=0

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

-9x=-108

x=-108/-9

x=+12

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