Answer:
solution,
[tex]0.5(20x - 50y + 36) - 0.25( - 100x + 40y - 12) \\ = 10x - 25y + 18 + 25x - 10y + 3 \\ [/tex]
Combine the like terms:
[tex] = 10x + 25x - 25y - 10y + 18 + 3 \\ [/tex]
Simplify:
[tex]35x - 35y + 21[/tex]
Hope this helps...
Good luck on your assignment...