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.80(x-100.00)=450.00
We simplify the equation to the form, which is simple to understand
.80(x-100.00)=450.00
Reorder the terms in parentheses
+( + 0.8x-80)=450.00
Remove unnecessary parentheses
+ 0.8x-80=+450.00
We move all terms containing x to the left and all other terms to the right.
+ 0.8x=+450+80
We simplify left and right side of the equation.
+ 0.8x=+530
We divide both sides of the equation by 0.8 to get x.
x=662.5
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