Answer:
XY= 12
Step-by-step explanation:
Please see attached picture for full solution.
The tip would be $17.26
All you have to do is multiply 86.29 x .2 (20%)
6x - 13y
5(2x - 2y) - (4x + 3y)
10x - 10y - 4x - 3y
10x - 4x - 10y - 3y