9/10y-7/10=21/5

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Solution for 9/10y-7/10=21/5 equation: 


y in (-oo:+oo)

(9/10)*y-(7/10) = 21/5 // - 21/5

(9/10)*y-(7/10)-(21/5) = 0

(9/10)*y-7/10-21/5 = 0

9/10*y-49/10 = 0 // + 49/10

9/10*y = 49/10 // : 9/10

y = 49/10/9/10

y = 49/9

y = 49/9

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