Answer:
first option
Step-by-step explanation:
Given
- 3x - 2y = 1 → (1)
- x + y = 3 → (2)
Rearrange (2) by adding x to both sides, that is
y = x + 3
Substitute y = x + 3 into (1)
- 3x - 2(x + 3) = 1 ← is the equation to be solved for x
