Question

if 2 X + 3 Y is equal to 3 and 5 x minus 4 Y is equal to minus 2 then a a1b2-a2b1 is equal to​

Answer 1

Answer:2x + 3y = 13__________(1)

5x -  4y =-2___________(2)

multiply eq.(1) by 5 and eq.(2) by 2

so, we get

10x + 15y = 65________(3)

10x -  8y   =-4________(4)

by eliminating method,

10x + 15y = 65

10x -  8y   =-4

-      +          +

-------------------

         23y  = 69

             y  = 3

putting the value of y in equation(1)

10x + 15(3) = 65

10x +  45    = 65

       10x     = 65 - 45

           x     = 20/10

           x     =  2

Step-by-step explanation: