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(3*x+(6/7)*x-7)*(14*x-((7/5)*x)+10) = 0
(3*x+(6/7)*x-7)*(14*x+(-7/5)*x+10) = 0
(27/7*x-7)*(63/5*x+10) = 0
( 27/7*x-7 )
27/7*x-7 = 0 // + 7
27/7*x = 7 // : 27/7
x = 7/27/7
x = 49/27
( 63/5*x+10 )
63/5*x+10 = 0 // - 10
63/5*x = -10 // : 63/5
x = -10/63/5
x = -50/63
x in { 49/27, -50/63 }
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