Answer:
(4, - 1 )
Step-by-step explanation:
Given the 2 equations
x + y = 3 → (1)
2x + y = 7 → (2)
Rearrange (2) expressing y in terms of x by subtracting 2x from both sides
y = 7 - 2x → (3)
Substitute y = 7 - 2x into (1)
x +7 - 2x = 3
7 - x = 3 ( subtract 7 from both sides )
- x = - 4 ( multiply both sides by - 1 )
x = 4
Substitute x = 4 into (3) for corresponding value of y
y = 7 - 8 = - 1
Solution is (4, - 1 )
