7. Systems of Equations & Matrices

In Exercises 1–4, determine whether the given ordered pair is a solution of the system.(- 3, 5)9x + 7y = 88x - 9y = - 69

Solve each system of equations. State whether it is an inconsistent system or has infinitely many solutions. If a system has infinitely many solutions, write the solution set with x arbitrary. See Examples 3 and 4.5x - 5y - 3 = 0 x - y - 12 = 0