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(2*x)/5+6/5 = (4*x)/3-(12/3) // - (4*x)/3-(12/3)
(2*x)/5-((4*x)/3)+6/5+12/3 = 0
(2*x)/5+(-4/3)*x+6/5+12/3 = 0
26/5-14/15*x = 0 // - 26/5
-14/15*x = -26/5 // : -14/15
x = -26/5/(-14/15)
x = 39/7
x = 39/7
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