(0.4n-1)/7=5

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Solution for (0.4n-1)/7=5 equation: 


n in (-oo:+oo)

(0.4*n-1)/7 = 5 // - 5

(0.4*n-1)/7-5 = 0

(0.4*n-1)/7+(-5*7)/7 = 0

0.4*n-5*7-1 = 0

0.4*n-36 = 0

(0.4*n-36)/7 = 0

(0.4*n-36)/7 = 0 // * 7

0.4*n-36 = 0

0.4*n-36 = 0 // + 36

0.4*n = 36 // : 0.4

n = 36/0.4

n = 90

n = 90

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