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21y=4(4y-6)
We simplify the equation to the form, which is simple to understand
21y=4(4y-6)
Reorder the terms in parentheses
21y=+(+16y-24)
Remove unnecessary parentheses
+21y=+16y-24
We move all terms containing y to the left and all other terms to the right.
+21y-16y=-24
We simplify left and right side of the equation.
+5y=-24
We divide both sides of the equation by 5 to get y.
y=-4.8
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