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16(90-x)=7(120-x)
We simplify the equation to the form, which is simple to understand
16(90-x)=7(120-x)
Reorder the terms in parentheses
+(+1440-16x)=7*(120-x)
Remove unnecessary parentheses
+1440-16x=+7+*(+120-x+)
Reorder the terms in parentheses
+1440-16x=+(+840-7x)
Remove unnecessary parentheses
+1440-16x=+840-7x
We move all terms containing x to the left and all other terms to the right.
-16x+7x=+840-1440
We simplify left and right side of the equation.
-9x=-600
We divide both sides of the equation by -9 to get x.
x=66.666666666667
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