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0.7(10x+13)=4.2(0.2x+5)
We move all terms to the left:
0.7(10x+13)-(4.2(0.2x+5))=0
We multiply parentheses
7x-(4.2(0.2x+5))+9.1=0
We calculate terms in parentheses: -(4.2(0.2x+5)), so:We get rid of parentheses
4.2(0.2x+5)
We multiply parentheses
0x+21
We add all the numbers together, and all the variables
x+21
Back to the equation:
-(x+21)
7x-x-21+9.1=0
We add all the numbers together, and all the variables
6x-11.9=0
We move all terms containing x to the left, all other terms to the right
6x=11.9
x=11.9/6
x=1+3.1052631578947/3.1578947368421
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