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0.13(70)+0.60x=0.30(70+x)
We move all terms to the left:
0.13(70)+0.60x-(0.30(70+x))=0
We add all the numbers together, and all the variables
0.60x-(0.30(x+70))+0.1370=0
We add all the numbers together, and all the variables
0.60x-(0.30(x+70))+0.137=0
We calculate terms in parentheses: -(0.30(x+70)), so:We get rid of parentheses
0.30(x+70)
We multiply parentheses
0.3x+21
Back to the equation:
-(0.3x+21)
0.60x-0.3x-21+0.137=0
We add all the numbers together, and all the variables
0.3x-20.863=0
We move all terms containing x to the left, all other terms to the right
0.3x=20.863
x=20.863/0.3
x=69+0.163/0.3
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