Question

Need help graphing:

x+y=7
y-x=7

point is (0,7)

Need two lines

Answer 1

put x=1,2,3 etc & calculate y.
With these points (1,6), (2,5) & (3,4) draw line on graph.
Similarly scatch graph for 2nd eqn.
u will see that they intersect at (0,7) & hence it is the ans.

Answer 2

The plot is attached