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x+x(1.39)=11.57
We move all terms to the left:
x+x(1.39)-(11.57)=0
We add all the numbers together, and all the variables
x+x(1.39)-11.57=0
We multiply parentheses
x+1.39x-11.57=0
We add all the numbers together, and all the variables
2.39x-11.57=0
We move all terms containing x to the left, all other terms to the right
2.39x=11.57
x=11.57/2.39
x=4+1/1.18905472637
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