1. (3, 1); x + y = 4

2x - y = 3

x = 7/3 y = 5/3

Step-by-step explanation:

x + y = 4 Rearrange it to make y the subject

y = 4 - x

2x - y = 3 substitute in rearranged value for y

2x - (4 - x) = 3

3x - 4 = 3

3x = 7

x = 7/3

Substitute into equation 1

7/3 + y = 4

y = 5/3