Answer:
19.8x - 11.1y
Explanation:
Given information:
- Gain 25x yards
- Gain 0.9y yards
- Lose 12y yards
- Lose 5.2x yards
"Gain" means to add the value.
"Lose" means to subtract the value.
Therefore, net yardage is:
⇒ 25x + 0.9y - 12y - 5.2x
Collect like terms:
⇒ 25x - 5.2x + 0.9y - 12y
Factor out the common variables x and y:
⇒ x(25 - 5.2) + y(0.9 - 12)
Carry out the operations in the parentheses:
⇒ x(19.8) + y(-11.1)
Therefore, the net yardage is 19.8x - 11.1y