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3x=-16-15x
We move all terms to the left:
3x-(-16-15x)=0
We add all the numbers together, and all the variables
3x-(-15x-16)=0
We get rid of parentheses
3x+15x+16=0
We add all the numbers together, and all the variables
18x+16=0
We move all terms containing x to the left, all other terms to the right
18x=-16
x=-16/18
x=-8/9
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