Question

9x+4y=5;4x-5y=9 by cross multiplication

Answer 1

Answer:

x=-1, y=1

Step-by-step explanation:

a1=9  b1=4 c1=5

a2=4  b2=-5 c2=9

x=b1c2-b2c1/a1b2-a2b1

=4*9-(-5)*5/9*(-5)-4*4

=36+25/-45-16

x=61/-61

x=-1

y=c1a2-c2a1/a1b2-a2b1

=5*4-9*9/9*(-5)-4*4

=20-81/-45-16

=-61/-61

y=61/61

y=1

Answer 2

Step-by-step explanation:

hope it will help you...