Answer:
x = 3, y = 2
Step-by-step explanation:
Given the 2 equations
x - 3y = - 3 → (1)
x + 3y = 9 → (2)
Adding the 2 equations term by term eliminates the term in y, that is
(x + x) + (3y - 3y) = (- 3 + 9), that is
2x = 6 ( divide both sides by 2 )
x = 3
Substitute x = 3 into either of the 2 equations and solve for y
Substituting x = 3 into (2)
3 + 3y = 9 ( subtract 3 from both sides )
3y = 6 ( divide both sides by 3 )
y = 2
