8/7=2x/21

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Solution for 8/7=2x/21 equation: 


x in (-oo:+oo)

8/7 = (2*x)/21 // - (2*x)/21

8/7-((2*x)/21) = 0

(-2/21)*x+8/7 = 0

8/7-2/21*x = 0 // - 8/7

-2/21*x = -8/7 // : -2/21

x = -8/7/(-2/21)

x = 12

x = 12

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