6f-7=21-8f

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Solution for 6f-7=21-8f equation:


Simplifying
6f + -7 = 21 + -8f

Reorder the terms:
-7 + 6f = 21 + -8f

Solving
-7 + 6f = 21 + -8f

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Add '8f' to each side of the equation.
-7 + 6f + 8f = 21 + -8f + 8f

Combine like terms: 6f + 8f = 14f
-7 + 14f = 21 + -8f + 8f

Combine like terms: -8f + 8f = 0
-7 + 14f = 21 + 0
-7 + 14f = 21

Add '7' to each side of the equation.
-7 + 7 + 14f = 21 + 7

Combine like terms: -7 + 7 = 0
0 + 14f = 21 + 7
14f = 21 + 7

Combine like terms: 21 + 7 = 28
14f = 28

Divide each side by '14'.
f = 2

Simplifying
f = 2

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