-63=21y

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Solution for -63=21y equation:


Simplifying
-63 = 21y

Solving
-63 = 21y

Solving for variable 'y'.

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

Add '-21y' to each side of the equation.
-63 + -21y = 21y + -21y

Combine like terms: 21y + -21y = 0
-63 + -21y = 0

Add '63' to each side of the equation.
-63 + 63 + -21y = 0 + 63

Combine like terms: -63 + 63 = 0
0 + -21y = 0 + 63
-21y = 0 + 63

Combine like terms: 0 + 63 = 63
-21y = 63

Divide each side by '-21'.
y = -3

Simplifying
y = -3

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