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y+21+y-24=(21+4)/2
We simplify the equation to the form, which is simple to understand
y+21+y-24=(21+4)/2
Simplifying terms in parentheses
y+21+y-24=(+25)/2
Reorder the terms in parentheses
y+21+y-24=(+12.5)
Remove unnecessary parentheses
y+21+y-24=+12.5
We move all terms containing y to the left and all other terms to the right.
+1y+1y=+12.5-21+24
We simplify left and right side of the equation.
+2y=+15.5
We divide both sides of the equation by 2 to get y.
y=7.75
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