Question

If [(x-y, x)(2x-y, w)] = [(-1,4)(0,5)], find the value of x+y.

Answer 1

x-y=-1 (corrponding equality)
x=4 ( SAME as above)
putting value of x in x-y=-1
4-y=-1
4+1=-y
y=-5

now
X+Y=4-5=-1