(х-6)(2х-5)-(х-4)(2х+9)=-6
2х²-12х-5х+30-2х²-9х+36=-6
-26х=-72
х=(дробь)36/13
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(х-6)(2х-5)-(х-4)(2х+9)=-6
2х²-12х-5х+30-2х²-9х+36=-6
-26х=-72
х=(дробь)36/13
2x^2-5x-12x+30-2x^2+9x-8x-36=-6
-16x-6=-6
-16x=0
x=0