Question 548342
-5	b		-2	a	=	46	.............1		
-5	b	+	7	a	=	19	.............2		
multiply equation (1) by -1
we get
5b+2a=-46
add to (2)
9a=-27
/9
a=-3
plug the value of a in (1)
-5b-2(-3)=46
-5b+6=46
-5b=40
/-5
b=-8