Question

Which equation doesn’t belong? Explain your reasoning 2x + y = 4 y = -2x + 4 f(x) = -2x + 4 2x + 2y = 4

Answer 1

2x+y=4 is equal to y=-2x+4
f(x) is known as y, so it would become y=-2x+4
2x+2y=4 equals y=-x+2.
most of the equations simplify being y=-2x+4. The one that didn’t simplify was 2x+2y=4 so it doesn’t belong.