X/4-9=12

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Solution for X/4-9=12 equation: 


X in (-oo:+oo)

X/4-9 = 12 // - 12

X/4-12-9 = 0

1/4*X-21 = 0 // + 21

1/4*X = 21 // : 1/4

X = 21/1/4

X = 84

X = 84

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