r/4-7=-3

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Solution for r/4-7=-3 equation: 


r in (-oo:+oo)

r/4-7 = -3 // + 3

r/4-7+3 = 0

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

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

r = 4/1/4

r = 16

r = 16

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