57+2x=15

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Solution for 57+2x=15 equation: 



57+2x=15

We move all terms to the left:

57+2x-(15)=0

We add all the numbers together, and all the variables

2x+42=0

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

2x=-42

x=-42/2

x=-21

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