3(x+x)=78

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Solution for 3(x+x)=78 equation: 



3(x+x)=78

We move all terms to the left:

3(x+x)-(78)=0

We add all the numbers together, and all the variables

3(+2x)-78=0

We multiply parentheses

6x-78=0

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

6x=78

x=78/6

x=13

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