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4(13*13+31)+y=21y
We simplify the equation to the form, which is simple to understand
4(13*13+31)+y=21y
Simplifying:
4*(+169+31)+y=21y
Simplifying terms in parentheses
4*(+200)+y=21y
Reorder the terms in parentheses
+(+800)+y=21y
Remove unnecessary parentheses
+800+y=+21y
We move all terms containing y to the left and all other terms to the right.
+1y-21y=-800
We simplify left and right side of the equation.
-20y=-800
We divide both sides of the equation by -20 to get y.
y=40
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