SOLUTION: Two functions are shown below: y= -2x + 3 y= 4x - 9 What is the value of x + y when the two functions are equal?

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Question 873456: Two functions are shown below:
y= -2x + 3
y= 4x - 9
What is the value of x + y when the two functions are equal?
Answer by ben720(159) About Me  (Show Source):
You can put this solution on YOUR website!
Because the two functions are equal,
-2x%2B3=4x-9
Add 2x+9 to both sides
12=6x
Divide both sides by 6
2=x
Substitute x
y=-2x%2B3
y=-2%2A2%2B3
y=3-4
y=-1
x+y
2-1
1

X+Y=1