3(x/5)=21+x - solution

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Solution for 3(x/5)=21+x equation:

x in (-oo:+oo)

3*(x/5) = x+21 // - x+21

3*(x/5)-x-21 = 0

-2/5*x-21 = 0 // + 21

-2/5*x = 21 // : -2/5

x = 21/(-2/5)

x = -105/2

x = -105/2

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