3(-4(y)-7)+12(y)=-21

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Solution for 3(-4(y)-7)+12(y)=-21 equation: 


Simplifying
3(-4(y) + -7) + 12(y) = -21

Reorder the terms:
3(-7 + -4y) + 12(y) = -21
(-7 * 3 + -4y * 3) + 12(y) = -21
(-21 + -12y) + 12(y) = -21

Combine like terms: -12y + 12y = 0
-21 + 0 = -21
-21 = -21

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

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

Combine like terms: -21 + 21 = 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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