-21=4y+7

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Solution for -21=4y+7 equation:


Simplifying
-21 = 4y + 7

Reorder the terms:
-21 = 7 + 4y

Solving
-21 = 7 + 4y

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-4y' to each side of the equation.
-21 + -4y = 7 + 4y + -4y

Combine like terms: 4y + -4y = 0
-21 + -4y = 7 + 0
-21 + -4y = 7

Add '21' to each side of the equation.
-21 + 21 + -4y = 7 + 21

Combine like terms: -21 + 21 = 0
0 + -4y = 7 + 21
-4y = 7 + 21

Combine like terms: 7 + 21 = 28
-4y = 28

Divide each side by '-4'.
y = -7

Simplifying
y = -7

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