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3.5(20)+7x=4.5(20+x)
We move all terms to the left:
3.5(20)+7x-(4.5(20+x))=0
We add all the numbers together, and all the variables
7x-(4.5(x+20))+3.520=0
We add all the numbers together, and all the variables
7x-(4.5(x+20))+3.52=0
We calculate terms in parentheses: -(4.5(x+20)), so:We get rid of parentheses
4.5(x+20)
We multiply parentheses
4.5x+90
Back to the equation:
-(4.5x+90)
7x-4.5x-90+3.52=0
We add all the numbers together, and all the variables
2.5x-86.48=0
We move all terms containing x to the left, all other terms to the right
2.5x=86.48
x=86.48/2.5
x=34+1/1.6891891891892
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