21/5=7x

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Solution for 21/5=7x equation: 


x in (-oo:+oo)

21/5 = 7*x // - 7*x

21/5-(7*x) = 0

21/5-7*x = 0

21/5-7*x = 0 // - 21/5

-7*x = -21/5 // : -7

x = -21/5/(-7)

x = 3/5

x = 3/5

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