7=(4+9y)/7

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Solution for 7=(4+9y)/7 equation: 


y in (-oo:+oo)

7 = (9*y+4)/7 // - (9*y+4)/7

7-((9*y+4)/7) = 0

(-1*(9*y+4))/7+7 = 0

(-1*(9*y+4))/7+(7^2)/7 = 0

49-1*(9*y+4) = 0

45-9*y = 0

(45-9*y)/7 = 0

(45-9*y)/7 = 0 // * 7

45-9*y = 0

45-9*y = 0 // - 45

-9*y = -45 // : -9

y = -45/(-9)

y = 5

y = 5

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