(x-9)/21=6/7-(x-7)/14

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Solution for (x-9)/21=6/7-(x-7)/14 equation: 


x in (-oo:+oo)

(x-9)/21 = 6/7-((x-7)/14) // - 6/7-((x-7)/14)

(x-9)/21+(x-7)/14-(6/7) = 0

(x-9)/21+(x-7)/14-6/7 = 0

(7*14*(x-9))/(7*14*21)+(7*21*(x-7))/(7*14*21)+(-6*14*21)/(7*14*21) = 0

7*14*(x-9)+7*21*(x-7)-6*14*21 = 0

245*x-1911-1764 = 0

245*x-3675 = 0

(245*x-3675)/(7*14*21) = 0

(245*x-3675)/(7*14*21) = 0 // * 7*14*21

245*x-3675 = 0

245*x-3675 = 0 // + 3675

245*x = 3675 // : 245

x = 3675/245

x = 15

x = 15

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