X/4-21=7

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Solution for X/4-21=7 equation: 


X in (-oo:+oo)

X/4-21 = 7 // - 7

X/4-21-7 = 0

1/4*X-28 = 0 // + 28

1/4*X = 28 // : 1/4

X = 28/1/4

X = 112

X = 112

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