1) x=0,4, y=0,6
6x-8y=6*0,4-8*0,6=2,4-4,8=−2,4
2) 2x-3y-11x+8y=-9x+5y
3) -4(2,5a-1,5)+5,5a-8= -10a+6+5.5a-8=-4,5a-2
-4,5a-2= -4,5*(-2)-2=9-2=7
1) x=0,4, y=0,6
6x-8y=6*0,4-8*0,6=2,4-4,8=−2,4
2) 2x-3y-11x+8y=-9x+5y
3) -4(2,5a-1,5)+5,5a-8= -10a+6+5.5a-8=-4,5a-2
-4,5a-2= -4,5*(-2)-2=9-2=7