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x in (-oo:+oo)
23 = (6*x+4)/7+(9*x+2)/2 // - (6*x+4)/7+(9*x+2)/2
23-((6*x+4)/7)-((9*x+2)/2) = 0
(-1*(6*x+4))/7+(-1*(9*x+2))/2+23 = 0
(-1*2*(6*x+4))/(2*7)+(-1*7*(9*x+2))/(2*7)+(2*7*23)/(2*7) = 0
2*7*23-1*2*(6*x+4)-1*7*(9*x+2) = 0
322-75*x-22 = 0
300-75*x = 0
(300-75*x)/(2*7) = 0
(300-75*x)/(2*7) = 0 // * 2*7
300-75*x = 0
300-75*x = 0 // - 300
-75*x = -300 // : -75
x = -300/(-75)
x = 4
x = 4
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