6+y/5=21 - solution

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Solution for 6+y/5=21 equation:

y in (-oo:+oo)

y/5+6 = 21 // - 21

y/5-21+6 = 0

1/5*y-15 = 0 // + 15

1/5*y = 15 // : 1/5

y = 15/1/5

y = 75

y = 75

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