-1/2r+11=15

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Solution for -1/2r+11=15 equation: 


r in (-oo:+oo)

(-1/2)*r+11 = 15 // - 15

(-1/2)*r-15+11 = 0

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

-1/2*r = 4 // : -1/2

r = 4/(-1/2)

r = -8

r = -8

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