7x=-8x-9

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Solution for 7x=-8x-9 equation: 



7x=-8x-9

We move all terms to the left:

7x-(-8x-9)=0

We get rid of parentheses

7x+8x+9=0

We add all the numbers together, and all the variables

15x+9=0

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

15x=-9

x=-9/15

x=-3/5

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