Answer:
(5, -5/4)
Step-by-step explanation:
3x+4y=10
3x-4y=20
Add the two equations together to eliminate y
3x+4y=10
3x-4y=20
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6x = 30
Divide by 6
6x/6 = 30/x
x = 5
Now we need to find y
3x+4y =10
3(5) +4y = 10
15 +4y = 10
Subtract 15 from each side
15-15 +4y = 10-15
4y = -5
Divide by 4
4y/4 = -5/4
y = -5/4
(5, -5/4)
