Welcome to Westonci.ca, where you can find answers to all your questions from a community of experienced professionals. Get quick and reliable answers to your questions from a dedicated community of professionals on our platform. Discover detailed answers to your questions from a wide network of experts on our comprehensive Q&A platform.

Solve the following systems of equations by elimination. Verify the solutions.
a.
r + 2s + 1 = 0
r + 5s + 28 = 0
b.
4m - 3n = 27
8m - 6n = 18