4=1/3x-1/7x

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Solution for 4=1/3x-1/7x equation: 


x in (-oo:+oo)

4 = (1/3)*x-((1/7)*x) // - (1/3)*x-((1/7)*x)

(1/7)*x-((1/3)*x)+4 = 0

(-1/3)*x+(1/7)*x+4 = 0

4-4/21*x = 0 // - 4

-4/21*x = -4 // : -4/21

x = -4/(-4/21)

x = 21

x = 21

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