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0.3x+0.3(20)=0.1(x+10)
We move all terms to the left:
0.3x+0.3(20)-(0.1(x+10))=0
We add all the numbers together, and all the variables
0.3x-(0.1(x+10))+0.32=0
We calculate terms in parentheses: -(0.1(x+10)), so:We get rid of parentheses
0.1(x+10)
We multiply parentheses
0.1x+1
Back to the equation:
-(0.1x+1)
0.3x-0.1x-1+0.32=0
We add all the numbers together, and all the variables
0.2x-0.68=0
We move all terms containing x to the left, all other terms to the right
0.2x=0.68
x=0.68/0.2
x=3+0.08/0.2
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