Solve the system of linear equations by substitution check your solution show work y-x=23 y=3x+11 a) 3 ,20 b)6,29 c)24,47 d)4,27 2 x-y=30 2.5 +y=5 a)8,-22 b) 122.5, 92.5 c) 10 , -20 d)11, -22.5

1. Plug in 3x + 11 where the Y is and solve for X.

3x + 11 - x = 23
2x = 12 
x = 6

Now plug back in.

y - 6 = 23
y = 23 + 6
y = 29. 

Your answer is (6, 29), option B

I can't tell what the second system of equations even is. 2x - y = 30? x - y = 30? The second equation doesn't look like it has a x-variable. It's spaced out weird. Can you just ask that in a separate question or type it in the replies?