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2(20-3x)=-10(9x-4)
We move all terms to the left:
2(20-3x)-(-10(9x-4))=0
We add all the numbers together, and all the variables
2(-3x+20)-(-10(9x-4))=0
We multiply parentheses
-6x-(-10(9x-4))+40=0
We calculate terms in parentheses: -(-10(9x-4)), so:We get rid of parentheses
-10(9x-4)
We multiply parentheses
-90x+40
Back to the equation:
-(-90x+40)
-6x+90x-40+40=0
We add all the numbers together, and all the variables
84x=0
x=0/84
x=0
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