4-5=8-2f

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Solution for 4-5=8-2f equation:


Simplifying
4 + -5 = 8 + -2f

Combine like terms: 4 + -5 = -1
-1 = 8 + -2f

Solving
-1 = 8 + -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.
-1 + 2f = 8 + -2f + 2f

Combine like terms: -2f + 2f = 0
-1 + 2f = 8 + 0
-1 + 2f = 8

Add '1' to each side of the equation.
-1 + 1 + 2f = 8 + 1

Combine like terms: -1 + 1 = 0
0 + 2f = 8 + 1
2f = 8 + 1

Combine like terms: 8 + 1 = 9
2f = 9

Divide each side by '2'.
f = 4.5

Simplifying
f = 4.5

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