(x/21)=-(6/7)

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Solution for (x/21)=-(6/7) equation: 


x in (-oo:+oo)

x/21 = -(6/7) // + 6/7

x/21+6/7 = 0

1/21*x+6/7 = 0 // - 6/7

1/21*x = -6/7 // : 1/21

x = -6/7/1/21

x = -18

x = -18

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