40-2.5r/0.5 - solution

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Solution for 40-2.5r/0.5 equation:

r in (-oo:+oo)

40-((2.5*r)/0.5) = 0

40-5*r = 0

40-5*r = 0 // - 40

-5*r = -40 // : -5

r = -40/(-5)

r = 8

r = 8

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