(8х + 3) – (10х + 6) = 9
8х+3-10х-6-9=0 -2х-12=0 -2х=12 х=-6
Ответ:
(8x+3)-(10x+6)=9
8x+3-10x-6=9
-2x-3=9
-2x=9+3
-2x=12
x=-6