-21=7(4+y)

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Solution for -21=7(4+y) equation:


-21=7(4+y)

We simplify the equation to the form, which is simple to understand 
-21=7(4+y)

Reorder the terms in parentheses
-21=+(+28+7y)

Remove unnecessary parentheses
-21=+28+7y

We move all terms containing y to the left and all other terms to the right. 
-7y=+28+21

We simplify left and right side of the equation. 
-7y=+49

We divide both sides of the equation by -07 to get y. 
y=-7

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