315=21y

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Solution for 315=21y equation:


Simplifying
315 = 21y

Solving
315 = 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.
315 + -21y = 21y + -21y

Combine like terms: 21y + -21y = 0
315 + -21y = 0

Add '-315' to each side of the equation.
315 + -315 + -21y = 0 + -315

Combine like terms: 315 + -315 = 0
0 + -21y = 0 + -315
-21y = 0 + -315

Combine like terms: 0 + -315 = -315
-21y = -315

Divide each side by '-21'.
y = 15

Simplifying
y = 15

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