42+x+15=3x

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Solution for 42+x+15=3x equation: 



42+x+15=3x

We move all terms to the left:

42+x+15-(3x)=0

We add all the numbers together, and all the variables

-2x+57=0

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

-2x=-57

x=-57/-2

x=28+1/2

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