Question

I need help solving this problem and showing my work i dont quite understand the steps on how to do it.

y=x-1
x+y=7

Answer 1

Use substitution:
substitute the value of y (y = x-1) into the second equation and solve for x:
x + (x - 1) = 7
x + x -1 = 7
2x - 1 = 7
+1
2x = 8
/2
x = 4

Now put in the value of x to solve for y:
x + y = 7
4 + y = 7
-4
y = 3

Answer 2

Does this help?

Answer 3

x+(x-1)=y the (x-1) is because y=x-1 so it replaced y.
2x-1=7
2x=6
x=3

3+y=7
y=5

Answer 4

@rickybobby13 you solved the first part incorrectly:
In order to get the 2x alone in 2x-1=7 you need to add the 1 to both sides.

Answer 5

@jazy yes thanks so much i got it now.

Answer 6

:)

Answer 7

my bad guys