Home > A2C > Chapter 7 > Lesson 7.3.5 > Problem 7-219
7-219.
Use matrices to solve these systems. Check your answers by substituting them in the original equations. You will not need a calculator if you use the results of the previous problem. Homework Help ✎
p + 2q = 7
3p + 4q = 114m − 5n = −2
−3m + 4n = 9
First substitute matrices for the equations.
Multiply both sides by the inverse.
Solve for p and q.
See part (a).