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x=-85+0.15/0.21
We move all terms to the left:
x-(-85+0.15/0.21)=0
We add all the numbers together, and all the variables
x-(0.15/0.21-85)=0
We get rid of parentheses
x+85-0.15/0.21=0
We multiply all the terms by the denominator
x*0.21-0.15+85*0.21=0
We add all the numbers together, and all the variables
x*0.21+17.7=0
Wy multiply elements
0.21x+17.7=0
We move all terms containing x to the left, all other terms to the right
0.21x=-17.7
x=-17.7/0.21
x=-84+0.059999999999999/0.21
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