Answer:
y= -1 and x = 10
Step-by-step explanation:
(1) x+3y=7
(2) 2x-4y=24
Clear x from the 1st equation: x=7-3y
And replace x from the 2do one: 2(7-3y)-4y=24
14-6y-4y=24
-6y-4y=24-14
-10y=10
y=-10/10
y=-1
Now we have y=-1, let's finde x:
x=7-3y
x=7-3(-1)
x=7+3
x=10
