Answer:
D. P = 15 and Q = 15
Step-by-step explanation:
Put the values of P and Q to the equation Px - 45 = Qx + 75:
15x - 45 = 15x + 75 subtract 15x from both sides
-45 = 75 FALSE
In other cases, we get some value x.
Example:
A. P = -45 and Q = -75
-45x - 45 = -75x + 75 add 45 to both sides
-45x = -75x + 120 add 75x to both sides
25x = 120 divide both sides by 25
x = 4.8
