Question

need help!
The Equation of the sides of a quadrilateral ABCD are as follows
AB: 4y+x=20
BC: x=0
CD:y+2x=2
AD: 3y=4x-4
Find the coordinates of A, B, C and D a=by a graphical method

Answer 1

solve all of them, then see such points which are only on two lines not more than that.

Answer 2

Solve
AB: 4y+x=20
BC: x=0
To get B

Solve
BC: x=0
CD:y+2x=2
To get C

Solve
CD:y+2x=2
AD: 3y=4x-4
To get D

Solve
AB: 4y+x=20
AD: 3y=4x-4
To get A

Answer 3

thank you!

Answer 4

Welcome~