Question

Solve the system by substitution.
y=x-3
y=-5x+9

Answer 1

x − y = 1. 3x = 3y + 3. First, solve the first equation for x to get x = y + 1. ... 9. y = 4x + 5. 2x + y = 17.SOLUTION: y = 4x + 5. 2x + y = 17. Substitute 4x + 5 for y in .... right, there is no solution to this systemof equations. 20. 5x − y = 5. −x + 3y = 13.

Answer 2

Since they are both set equal to y you can set them equal to each other.The solution is (2, -1)