9x/7-x-(x-28)/21=0

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Solution for 9x/7-x-(x-28)/21=0 equation: 


x in (-oo:+oo)

(9*x)/7-((x-28)/21)-x = 0

(-1*(x-28))/21+(9*x)/7-x = 0

(-1*7*(x-28))/(7*21)+(9*21*x)/(7*21)+(7*21*(-x))/(7*21) = 0

9*21*x-1*7*(x-28)+7*21*(-x) = 0

182*x-147*x+196 = 0

35*x+196 = 0

(35*x+196)/(7*21) = 0

(35*x+196)/(7*21) = 0 // * 7*21

35*x+196 = 0

35*x+196 = 0 // - 196

35*x = -196 // : 35

x = -196/35

x = -28/5

x = -28/5

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