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5x-4(3-5x)=2(4x+19.5)
We move all terms to the left:
5x-4(3-5x)-(2(4x+19.5))=0
We add all the numbers together, and all the variables
5x-4(-5x+3)-(2(4x+19.5))=0
We multiply parentheses
5x+20x-(2(4x+19.5))-12=0
We calculate terms in parentheses: -(2(4x+19.5)), so:We add all the numbers together, and all the variables
2(4x+19.5)
We multiply parentheses
8x+39
Back to the equation:
-(8x+39)
25x-(8x+39)-12=0
We get rid of parentheses
25x-8x-39-12=0
We add all the numbers together, and all the variables
17x-51=0
We move all terms containing x to the left, all other terms to the right
17x=51
x=51/17
x=3
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