Answer:
x=10
y=-3
Step-by-step explanation:
3x + 5y= 15...eqn. 1
2x + 4y= 8...eqn. 2
multiply eqn. 1 by 2 and eqn. 2 by 3
6x + 10y = 30...eqn. 3
6x + 12y = 24...eqn. 4
0 - 2y = 6
divide both sides by the coefficient of y which is -2
- 2y = 6
- 2 -2
y= -3
Put y= -3 into eqn. 1
3x + 5(-3) = 15
3x - 15 = 15
3x =15 + 15
3x = 30
3 3
x = 10
Therefore X= 10 and Y= -3
