21+9f+6f-13=19f+15-4f-7

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Solution for 21+9f+6f-13=19f+15-4f-7 equation: 


Simplifying
21 + 9f + 6f + -13 = 19f + 15 + -4f + -7

Reorder the terms:
21 + -13 + 9f + 6f = 19f + 15 + -4f + -7

Combine like terms: 21 + -13 = 8
8 + 9f + 6f = 19f + 15 + -4f + -7

Combine like terms: 9f + 6f = 15f
8 + 15f = 19f + 15 + -4f + -7

Reorder the terms:
8 + 15f = 15 + -7 + 19f + -4f

Combine like terms: 15 + -7 = 8
8 + 15f = 8 + 19f + -4f

Combine like terms: 19f + -4f = 15f
8 + 15f = 8 + 15f

Add '-8' to each side of the equation.
8 + -8 + 15f = 8 + -8 + 15f

Combine like terms: 8 + -8 = 0
0 + 15f = 8 + -8 + 15f
15f = 8 + -8 + 15f

Combine like terms: 8 + -8 = 0
15f = 0 + 15f
15f = 15f

Add '-15f' to each side of the equation.
15f + -15f = 15f + -15f

Combine like terms: 15f + -15f = 0
0 = 15f + -15f

Combine like terms: 15f + -15f = 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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