-3(7y-3)+21y=9

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Solution for -3(7y-3)+21y=9 equation: 


Simplifying
-3(7y + -3) + 21y = 9

Reorder the terms:
-3(-3 + 7y) + 21y = 9
(-3 * -3 + 7y * -3) + 21y = 9
(9 + -21y) + 21y = 9

Combine like terms: -21y + 21y = 0
9 + 0 = 9
9 = 9

Add '-9' to each side of the equation.
9 + -9 = 9 + -9

Combine like terms: 9 + -9 = 0
0 = 9 + -9

Combine like terms: 9 + -9 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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