Question

A system of equations has 1 solution. If 4x – y = 5 is one of the equations, which could be the other equation?

Answer 1

Next time please post the choices:

y = –4x + 5
y = 4x – 5
2y = 8x – 10
–2y = –8x – 10

Answer 2

if the system of equations only has one solution, that means the two equations must have a different slope *and* y-intercept

so first, evaluate what the slope and y-intercept of 4x – y = 5 are, then look for the answer choice has a different slope and y-intercept