5/7=a/42

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Solution for 5/7=a/42 equation: 


a in (-oo:+oo)

5/7 = a/42 // - a/42

5/7-(a/42) = 0

5/7-1/42*a = 0 // - 5/7

-1/42*a = -5/7 // : -1/42

a = -5/7/(-1/42)

a = 30

a = 30

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