40=5x-12+8x

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Solution for 40=5x-12+8x equation: 



40=5x-12+8x

We move all terms to the left:

40-(5x-12+8x)=0

We add all the numbers together, and all the variables

-(13x-12)+40=0

We get rid of parentheses

-13x+12+40=0

We add all the numbers together, and all the variables

-13x+52=0

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

-13x=-52

x=-52/-13

x=+4

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