x+42/2=4x

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Solution for x+42/2=4x equation: 


x in (-oo:+oo)

x+42/2 = 4*x // - 4*x

x-(4*x)+42/2 = 0

x-4*x+42/2 = 0

21-3*x = 0 // - 21

-3*x = -21 // : -3

x = -21/(-3)

x = 7

x = 7

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