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40-2x=6(5x+4)
We move all terms to the left:
40-2x-(6(5x+4))=0
We calculate terms in parentheses: -(6(5x+4)), so:We get rid of parentheses
6(5x+4)
We multiply parentheses
30x+24
Back to the equation:
-(30x+24)
-2x-30x-24+40=0
We add all the numbers together, and all the variables
-32x+16=0
We move all terms containing x to the left, all other terms to the right
-32x=-16
x=-16/-32
x=1/2
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