7x+9=-5x-15

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



7x+9=-5x-15

We move all terms to the left:

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

We get rid of parentheses

7x+5x+15+9=0

We add all the numbers together, and all the variables

12x+24=0

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

12x=-24

x=-24/12

x=-2

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