4a-5b=-1 |*2
5a-2b=-14 |*(-5)
8a-10b=-2
-25a+10b=70 |(+)
8a-25a-10b+10b=-2+70
-17a=68
a=68:(-17)
a=-4
5b=4a+1
b=(4a+1)/5
b=(4*(-4)+1)/5
b=-3
ответ (-4; -3)
4a-5b=-1 |*2
5a-2b=-14 |*(-5)
8a-10b=-2
-25a+10b=70 |(+)
8a-25a-10b+10b=-2+70
-17a=68
a=68:(-17)
a=-4
5b=4a+1
b=(4a+1)/5
b=(4*(-4)+1)/5
b=-3
ответ (-4; -3)