7. Systems of Equations & Matrices

Exercises 86–88 will help you prepare for the material covered in the first section of the next chapter.a. Does (4, −1) satisfy x + 2y = 2?b. Does (4, -1) satisfy x- 2y= 6?

Solve each problem. See Examples 5 and 9. The sum of two numbers is 47, and the difference between the numbers is 1. Find the numbers.