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(-2/7)*x+4*x+4/5 = -102/35 // + -102/35
(-2/7)*x+4*x+4/5-(-102/35) = 0
(-2/7)*x+4*x+4/5+102/35 = 0
26/7*x+26/7 = 0 // - 26/7
26/7*x = -26/7 // : 26/7
x = -26/7/26/7
x = -1
x = -1
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