9x+21+5x+15=7x-7

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Solution for 9x+21+5x+15=7x-7 equation: 



9x+21+5x+15=7x-7

We move all terms to the left:

9x+21+5x+15-(7x-7)=0

We add all the numbers together, and all the variables

14x-(7x-7)+36=0

We get rid of parentheses

14x-7x+7+36=0

We add all the numbers together, and all the variables

7x+43=0

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

7x=-43

x=-43/7

x=-6+1/7

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