3x+12=-4x-5

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Solution for 3x+12=-4x-5 equation: 



3x+12=-4x-5

We move all terms to the left:

3x+12-(-4x-5)=0

We get rid of parentheses

3x+4x+5+12=0

We add all the numbers together, and all the variables

7x+17=0

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

7x=-17

x=-17/7

x=-2+3/7

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