x/5+21=18 - solution

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Solution for x/5+21=18 equation:

x in (-oo:+oo)

x/5+21 = 18 // - 18

x/5-18+21 = 0

1/5*x+3 = 0 // - 3

1/5*x = -3 // : 1/5

x = -3/1/5

x = -15

x = -15

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