y/7=21

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Solution for y/7=21 equation: 


y in (-oo:+oo)

y/7 = 21 // - 21

y/7-21 = 0

1/7*y-21 = 0 // + 21

1/7*y = 21 // : 1/7

y = 21/1/7

y = 147

y = 147

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