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4x+2x(-1)=-10
We move all terms to the left:
4x+2x(-1)-(-10)=0
We add all the numbers together, and all the variables
4x+2x(-1)+10=0
We multiply parentheses
4x-2x+10=0
We add all the numbers together, and all the variables
2x+10=0
We move all terms containing x to the left, all other terms to the right
2x=-10
x=-10/2
x=-5
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