m/2+m/5=21 - solution

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Solution for m/2+m/5=21 equation:

m in (-oo:+oo)

m/2+m/5 = 21 // - 21

m/2+m/5-21 = 0

7/10*m-21 = 0 // + 21

7/10*m = 21 // : 7/10

m = 21/7/10

m = 30

m = 30

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