a
step-by-step explanation:
given the 2 equations
- x + y = - 2 → (1)
2x - 3y = 4 → (2)
multiplying (1) by 2 and adding to (2) will eliminate the x- term
- 2x + 2y = - 4 → (3)
add (2) and (3) term by term
(2x - 2x) + (- 3y + 2y) = (4 - 4), simplifying gives
- y = 0 ⇒ y = 0
substitute y = 0 in either of the 2 equations for corresponding value of x
substituting in (2) gives
2x = 4 ( divide both sides by 2 )
x = 2
solution is (2, 0 ) → a