2(r/3-7)=30

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Solution for 2(r/3-7)=30 equation: 


r in (-oo:+oo)

2*(r/3-7) = 30 // - 30

2*(r/3-7)-30 = 0

2*(1/3*r-7)-30 = 0

2*(1/3*r-7)-30 = 0

2/3*r-44 = 0

2/3*r-44 = 0

2/3*r-44 = 0 // + 44

2/3*r = 44 // : 2/3

r = 44/2/3

r = 66

r = 66

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