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42=-4x+6(-x+22)
We move all terms to the left:
42-(-4x+6(-x+22))=0
We add all the numbers together, and all the variables
-(-4x+6(-1x+22))+42=0
We calculate terms in parentheses: -(-4x+6(-1x+22)), so:We get rid of parentheses
-4x+6(-1x+22)
We multiply parentheses
-4x-6x+132
We add all the numbers together, and all the variables
-10x+132
Back to the equation:
-(-10x+132)
10x-132+42=0
We add all the numbers together, and all the variables
10x-90=0
We move all terms containing x to the left, all other terms to the right
10x=90
x=90/10
x=9
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