15+7x=2x+30

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Solution for 15+7x=2x+30 equation: 



15+7x=2x+30

We move all terms to the left:

15+7x-(2x+30)=0

We get rid of parentheses

7x-2x-30+15=0

We add all the numbers together, and all the variables

5x-15=0

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

5x=15

x=15/5

x=3

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