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4x-12x=4(x-3x)
We move all terms to the left:
4x-12x-(4(x-3x))=0
We add all the numbers together, and all the variables
4x-12x-(4(-2x))=0
We add all the numbers together, and all the variables
-8x-(4(-2x))=0
We calculate terms in parentheses: -(4(-2x)), so:We get rid of parentheses
4(-2x)
We multiply parentheses
-8x
Back to the equation:
-(-8x)
-8x+8x=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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