r/4-3=7

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Solution for r/4-3=7 equation: 


r in (-oo:+oo)

r/4-3 = 7 // - 7

r/4-7-3 = 0

1/4*r-10 = 0 // + 10

1/4*r = 10 // : 1/4

r = 10/1/4

r = 40

r = 40

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