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1-x/21=3(x+9)/3
We simplify the equation to the form, which is simple to understand
1-x/21=3(x+9)/3
Reorder the terms in parentheses
1-0.047619047619048x=+(+3x+27)/3
Reorder the terms in parentheses
1-0.047619047619048x=+(+1x+9)
Remove unnecessary parentheses
+1-0.047619047619048x=+1x+9
We move all terms containing x to the left and all other terms to the right.
-0.047619047619048x-1x=+9-1
We simplify left and right side of the equation.
-1.047619047619x=+8
We divide both sides of the equation by -1.047619047619 to get x.
x=-7.6363636363636
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