Question

the graphof equations 2x - y - 4 =0 and X + Y + 1 =0 intersect at point p(a,b) what is the coordinate of p​

Answer 1

Answer:

point P(1, -2)

Step-by-step explanation:

2x – y – 4 = 0-------eqn1

x + y + 1 = 0 ---------eqn2

add eqn1+ eqn2, we get

2x-y-4+x+y+1=0+0

3x-3=0

3x=3

x=1

sub x=1 in eqn1, we get

2*1-y-4=0

2-y-4=0

-y-2=0

-y=2

y= -2

point P(1, -2)