18-(-f)=40

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Solution for 18-(-f)=40 equation:


Simplifying
18 + -1(-1f) = 40

Remove parenthesis around (-1f)
18 + -1 * -1f = 40

Multiply -1 * -1
18 + 1f = 40

Solving
18 + 1f = 40

Solving for variable 'f'.

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

Add '-18' to each side of the equation.
18 + -18 + 1f = 40 + -18

Combine like terms: 18 + -18 = 0
0 + 1f = 40 + -18
1f = 40 + -18

Combine like terms: 40 + -18 = 22
1f = 22

Divide each side by '1'.
f = 22

Simplifying
f = 22

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