7(3a-4)=21a

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Solution for 7(3a-4)=21a equation: 


Simplifying
7(3a + -4) = 21a

Reorder the terms:
7(-4 + 3a) = 21a
(-4 * 7 + 3a * 7) = 21a
(-28 + 21a) = 21a

Add '-21a' to each side of the equation.
-28 + 21a + -21a = 21a + -21a

Combine like terms: 21a + -21a = 0
-28 + 0 = 21a + -21a
-28 = 21a + -21a

Combine like terms: 21a + -21a = 0
-28 = 0

Solving
-28 = 0

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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