-4y-21=3y

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Solution for -4y-21=3y equation:


Simplifying
-4y + -21 = 3y

Reorder the terms:
-21 + -4y = 3y

Solving
-21 + -4y = 3y

Solving for variable 'y'.

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

Add '-3y' to each side of the equation.
-21 + -4y + -3y = 3y + -3y

Combine like terms: -4y + -3y = -7y
-21 + -7y = 3y + -3y

Combine like terms: 3y + -3y = 0
-21 + -7y = 0

Add '21' to each side of the equation.
-21 + 21 + -7y = 0 + 21

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

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

Divide each side by '-7'.
y = -3

Simplifying
y = -3

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