3x+5x+7=2x-5

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Solution for 3x+5x+7=2x-5 equation: 



3x+5x+7=2x-5

We move all terms to the left:

3x+5x+7-(2x-5)=0

We add all the numbers together, and all the variables

8x-(2x-5)+7=0

We get rid of parentheses

8x-2x+5+7=0

We add all the numbers together, and all the variables

6x+12=0

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

6x=-12

x=-12/6

x=-2

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