x-2y=-3
y=x/2+1.54x+3y=104x+3*(x/2+1.5)=104x+1.5x+4.5-10=0 5.5x+4.5-10=0 5.5x-5.5=0
x=5.5/5.5
x=1
x-2y=-31-2y=-3
4-2y=0
y=4/2y=2ответ: x=1; y=2.
x-2y=-3
y=x/2+1.5
4x+3y=10
4x+3*(x/2+1.5)=10
4x+1.5x+4.5-10=0
5.5x+4.5-10=0
5.5x-5.5=0
x=5.5/5.5
x=1
x-2y=-3
1-2y=-3
4-2y=0
y=4/2
y=2
ответ: x=1; y=2.
2x+5y=-2 |*2
4x+3y=10
4x+10y=-4
-7y=14
y=-2
2x+5*(-2)=-2
2x=-2+10
2x=8
x=4
ответ:(4;-2)