Answer:
(-4, 2)
Step-by-step explanation:
5x + 15y = 10 ---› Eqn. 1
5x - 10y = -40 ---› Eqn. 2
Subtract the eqn 2 from 1 to eliminate the x variable
Thus:
25y = 50
Divide both sides by 25
y = 50/25
y = 2
Substitute y = 2 into eqn 1.
5x + 15y = 10 ---› Eqn. 1
5x + 15(2) = 10
5x + 30 = 10
Subtract 30 from each side
5x = 10 - 30
5x = -20
Divide both sides by 5
5x/5 = -20/5
x = -4
Solution would therefore be (-4, 2)
