12/7r-1/21r=r-8/3

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Solution for 12/7r-1/21r=r-8/3 equation: 


r in (-oo:+oo)

(12/7)*r-((1/21)*r) = r-(8/3) // - r-(8/3)

(12/7)*r-((1/21)*r)-r+8/3 = 0

(12/7)*r+(-1/21)*r-r+8/3 = 0

2/3*r+8/3 = 0 // - 8/3

2/3*r = -8/3 // : 2/3

r = -8/3/2/3

r = -4

r = -4

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