f/2-7=-3 - solution

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Solution for f/2-7=-3 equation:

f in (-oo:+oo)

f/2-7 = -3 // + 3

f/2-7+3 = 0

1/2*f-4 = 0 // + 4

1/2*f = 4 // : 1/2

f = 4/1/2

f = 8

f = 8

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