1/2x-20 - solution

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Solution for 1/2x-20 equation:

x in (-oo:+oo)

(1/2)*x-2 > 0

1/2*x-2 > 0 // + 2

1/2*x > 2 // : 1/2

x > 2/1/2

x > 4

x in (4:+oo)

(4:+oo)

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