2x+15=7x+30

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



2x+15=7x+30

We move all terms to the left:

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

We get rid of parentheses

2x-7x-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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