7=21y

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Solution for 7=21y equation:


Simplifying
7 = 21y

Solving
7 = 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.
7 + -21y = 21y + -21y

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

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

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

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

Divide each side by '-21'.
y = 0.3333333333

Simplifying
y = 0.3333333333

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