(17x-5)/(15x+5) + (13x -1)/(6x+2) = (7x-3)/(3x+1) + 1 , x≠ -1/3
(2(17x-5))/(30x + 10) + (5(13x-1))/(30x + 10) = (10(7x-3))/(30x + 10) + (30x + 10)/(30x + 10)
(2(17x-5)) + (5(13x-1)) = (10(7x-3)) + (30x + 10)
34x - 10 + 65x - 5 = 70x - 30 + 30x + 10
99x - 15 = 100x - 20 | -99x + 20
5 = x
Probe: Kontrolliere, ob hier unten links und rechts dasselbe steht:
(17*5-5)/(15*5+5) + (13*5 -1)/(6*5+2) = (7*5-3)/(3*5+1) + 1