7-r/2=-10

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Solution for 7-r/2=-10 equation: 


r in (-oo:+oo)

7-(r/2) = -10 // + 10

7-(r/2)+10 = 0

17-1/2*r = 0 // - 17

-1/2*r = -17 // : -1/2

r = -17/(-1/2)

r = 34

r = 34

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