Answer:
(- 5, - 5 )
Step-by-step explanation:
Given the 2 equations
10x - 5y = - 25 → (1)
- 2x + 2y = 0 → (2)
Multiplying (2) by 5 and adding to (1) will eliminate the term in x
- 10x + 10y = 0 → (3)
Add (1) and (3) term by term
5y = - 25 ( divide both sides by 5 )
y = - 5
Substitute y = - 5 into either of the 2 equations and solve for x
Substituting in (1)
10x - 5(- 5) = - 25, that is
10x + 25 = - 25 ( subtract 25 from both ides )
10x = - 50 ( divide both sides by 10 )
x = - 5
Solution is (- 5, - 5 )
