X/7-x/9=4

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Solution for X/7-x/9=4 equation: 


x in (-oo:+oo)

X/7-(x/9) = 4 // - 4

X/7-(x/9)-4 = 0

1/7*X-1/9*x-4 = 0 // - 1/7*X-4

-1/9*x = -(1/7*X-4) // : -1/9

x = (-(1/7*X-4))/(-1/9)

x = -9*(4-(1/7*X))

x = -9*(4-(1/7*X))

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