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x=.21(x+100)
We simplify the equation to the form, which is simple to understand
x=.21(x+100)
Reorder the terms in parentheses
x=+( + 0.21x+21)
Remove unnecessary parentheses
+x=0.21x+21
We move all terms containing x to the left and all other terms to the right.
+1x-0.21x=+21
We simplify left and right side of the equation.
+ 0.79x=+21
We divide both sides of the equation by 0.79 to get x.
x=26.582278481
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