-90=f*9

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Solution for -90=f*9 equation:


Simplifying
-90 = f * 9

Reorder the terms for easier multiplication:
-90 = 9f

Solving
-90 = 9f

Solving for variable 'f'.

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

Add '-9f' to each side of the equation.
-90 + -9f = 9f + -9f

Combine like terms: 9f + -9f = 0
-90 + -9f = 0

Add '90' to each side of the equation.
-90 + 90 + -9f = 0 + 90

Combine like terms: -90 + 90 = 0
0 + -9f = 0 + 90
-9f = 0 + 90

Combine like terms: 0 + 90 = 90
-9f = 90

Divide each side by '-9'.
f = -10

Simplifying
f = -10

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