Question

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

Answer 1

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?