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3x-2(4+5x)=-50
We move all terms to the left:
3x-2(4+5x)-(-50)=0
We add all the numbers together, and all the variables
3x-2(5x+4)-(-50)=0
We add all the numbers together, and all the variables
3x-2(5x+4)+50=0
We multiply parentheses
3x-10x-8+50=0
We add all the numbers together, and all the variables
-7x+42=0
We move all terms containing x to the left, all other terms to the right
-7x=-42
x=-42/-7
x=+6
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