Answer:
[tex]3r + 2s + 8t + 15[/tex]
Step-by-step explanation:
[tex]7r + 10 - 2(2r + 3s - 5t) + 2(4s - t) + 5[/tex]
[tex] = > 7r + 10 - 4r - 6s + 10t + 8s - 2t + 5[/tex]
[tex] = > 7r - 4r + 8s - 6s + 10t - 2t + 10 + 5[/tex]
[tex] = > 3r + 2s + 8t + 15[/tex]
