Answer the questions d, e, and f for 18 and follow the instructions given. This Is MATH for EE and CE.

18 Use the matrix inverse to solve the following systems : a ) S x+34 = 4 8 ) 2 x - 4 = 3 1 4 3 x thy = 7 2 xtu = 3 xt 24 = 4 - -.. x+ 34 =10 d ) 2ax + (a- 3) y = a-( ( a- 3 )x t Ray = a- a2 e) x+ lately = 2 ax- y = -a (at 2) x+ (1- a9) 4= 5 x - ay = a- a2