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2x-4(x-3)=-2+5x-21
We move all terms to the left:
2x-4(x-3)-(-2+5x-21)=0
We add all the numbers together, and all the variables
2x-4(x-3)-(5x-23)=0
We multiply parentheses
2x-4x-(5x-23)+12=0
We get rid of parentheses
2x-4x-5x+23+12=0
We add all the numbers together, and all the variables
-7x+35=0
We move all terms containing x to the left, all other terms to the right
-7x=-35
x=-35/-7
x=+5
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