6+8x+7x=-9

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Solution for 6+8x+7x=-9 equation: 



6+8x+7x=-9

We move all terms to the left:

6+8x+7x-(-9)=0

We add all the numbers together, and all the variables

15x+15=0

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

15x=-15

x=-15/15

x=-1

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