12/7r-4=5/7r - solution

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Solution for 12/7r-4=5/7r equation:

r in (-oo:+oo)

(12/7)*r-4 = (5/7)*r // - (5/7)*r

(12/7)*r-((5/7)*r)-4 = 0

(12/7)*r+(-5/7)*r-4 = 0

r-4 = 0 // + 4

r = 4

r = 4

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