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2(-7-4x)=-2(9+9x)
We move all terms to the left:
2(-7-4x)-(-2(9+9x))=0
We add all the numbers together, and all the variables
2(-4x-7)-(-2(9x+9))=0
We multiply parentheses
-8x-(-2(9x+9))-14=0
We calculate terms in parentheses: -(-2(9x+9)), so:We get rid of parentheses
-2(9x+9)
We multiply parentheses
-18x-18
Back to the equation:
-(-18x-18)
-8x+18x+18-14=0
We add all the numbers together, and all the variables
10x+4=0
We move all terms containing x to the left, all other terms to the right
10x=-4
x=-4/10
x=-2/5
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