7r=-7/2

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Solution for 7r=-7/2 equation: 


r in (-oo:+oo)

7*r = -7/2 // + -7/2

7*r-(-7/2) = 0

7*r+7/2 = 0

7*r+7/2 = 0 // - 7/2

7*r = -7/2 // : 7

r = -7/2/7

r = -1/2

r = -1/2

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