2х+3х+6=4х+11
5х+6=4х+11
5х-4х=11-6
х=5
Х= -1.4 У=-4.7 ; Х=2.6 У=-2.7 ; Х=8.8 У=0.4 У=-3.4 Х= 2.8 ; У=-1.8 Х=4.4; У=2.4 Х=12.8
7(10-x)+3(2x-1)=70-7x+6x-3=-x+67
x=-0.048 -x+67=-(-0.048)+67=0.048+67=67.048
0.01(2.2х-0.1)+0.1(х-100)=0.01(2.2*(-10)-0.1)+0.1(-10-100)=0.01(-22-0.1)+0.1*(-110)=0.01*(-22.1)-11=-0.221-11=-11.221