X/2-1=3.5 - solution

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Solution for X/2-1=3.5 equation:

X in (-oo:+oo)

X/2-1 = 3.5 // - 3.5

X/2-3.5-1 = 0

1/2*X-4.5 = 0 // + 4.5

1/2*X = 4.5 // : 1/2

X = 4.5/1/2

X = 9

X = 9

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