13=-4+f

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Solution for 13=-4+f equation:


Simplifying
13 = -4 + f

Solving
13 = -4 + f

Solving for variable 'f'.

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

Add '-1f' to each side of the equation.
13 + -1f = -4 + f + -1f

Combine like terms: f + -1f = 0
13 + -1f = -4 + 0
13 + -1f = -4

Add '-13' to each side of the equation.
13 + -13 + -1f = -4 + -13

Combine like terms: 13 + -13 = 0
0 + -1f = -4 + -13
-1f = -4 + -13

Combine like terms: -4 + -13 = -17
-1f = -17

Divide each side by '-1'.
f = 17

Simplifying
f = 17

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