21-6x/7=15

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Solution for 21-6x/7=15 equation: 


x in (-oo:+oo)

21-((6*x)/7) = 15 // - 15

21-((6*x)/7)-15 = 0

(-6/7)*x-15+21 = 0

6-6/7*x = 0 // - 6

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

x = -6/(-6/7)

x = 7

x = 7

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