Answer: See below
Step-by-step explanation:
4y = x - 4
y = (1/4)x - 1, or
x = 4y + 4
4x+3y=5
3y = -4x + 5
y = -(4/3)x + (5/4), or
4x = -3y + 5
x = -(3/4)y + (5/4)
