13=7+2f

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Solution for 13=7+2f equation:


Simplifying
13 = 7 + 2f

Solving
13 = 7 + 2f

Solving for variable 'f'.

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

Add '-2f' to each side of the equation.
13 + -2f = 7 + 2f + -2f

Combine like terms: 2f + -2f = 0
13 + -2f = 7 + 0
13 + -2f = 7

Add '-13' to each side of the equation.
13 + -13 + -2f = 7 + -13

Combine like terms: 13 + -13 = 0
0 + -2f = 7 + -13
-2f = 7 + -13

Combine like terms: 7 + -13 = -6
-2f = -6

Divide each side by '-2'.
f = 3

Simplifying
f = 3

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