X/3-15=21 - solution

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Solution for X/3-15=21 equation:

X in (-oo:+oo)

X/3-15 = 21 // - 21

X/3-21-15 = 0

1/3*X-36 = 0 // + 36

1/3*X = 36 // : 1/3

X = 36/1/3

X = 108

X = 108

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