(5/7, 12/7) <- I think you meant to type that. Its the first one
Step 1: Substitute y=x+1 in for y in 5x + 2y = 7
5x + 2(x+1) = 7
Step 2: Solve it
5x + 2x + 2 = 7
7x + 2 = 7
- 2 - 2
7x = 5
--- ---
7 7
x = 5/7
Step 3; Plug x into y=x+1
y = 5/7 + 1
y = 12/7
Answer:
{(5/7 , 12/7)}
Step-by-step explanation:
First plug y into one of the x's
5x + 2(x + 1) = 7
Now solve for X
5x + 2x + 2 = 7
Combine like terms
7x + 2 = 7
Subtract 2 from each side
7x = 5
Divide to get x by itself
x = 5/7
Now plug that into the second equation for x
y = 5/7 + 1
now just solve it
y = 12/7 if they want it simplified then it's 1 5/7
Hope this helped!
