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3x-(-x)+2(-x)=2(-x)+(-16)
We move all terms to the left:
3x-(-x)+2(-x)-(2(-x)+(-16))=0
We add all the numbers together, and all the variables
3x-(-1x)+2(-1x)-(2(-1x)+(-16))=0
We multiply parentheses
3x-(-1x)-2x-(2(-1x)+(-16))=0
We get rid of parentheses
3x+1x-2x-(2(-1x)+(-16))=0
We calculate terms in parentheses: -(2(-1x)+(-16)), so:We add all the numbers together, and all the variables
2(-1x)+(-16)
We add all the numbers together, and all the variables
2(-1x)-16
We multiply parentheses
-2x-16
Back to the equation:
-(-2x-16)
2x-(-2x-16)=0
We get rid of parentheses
2x+2x+16=0
We add all the numbers together, and all the variables
4x+16=0
We move all terms containing x to the left, all other terms to the right
4x=-16
x=-16/4
x=-4
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