Y=x-4 2x+y=5 solve each system of linear equations by substitution

Substitute the x-4 in to the second equation for the y:

2x + (x-4) = 5

2x+x-4=5

Combine like terms and add the 4 to both sides

3x=9

Divide by 3:

x=3

Substitute the 3 in for x in either equation and solve for y:

y=3-4

y=-1

Answer:

x=3

y=-1