Question

8. Find all possible solutions of the following pair of linear equations:
4x + 5y = 13 and 2x - 2y = 16.
ГР.S.​

Answer 1

Answer:

multiply by 2 second equation

4x-4y=32

4x+5y=13

subtract equation

-9y=19

y=-19/9

Answer 2

Answer:

(4x+5y=13)-(2x-2y=16)2

4x+5y-4x+4y=13-32

9y=-19

y=-19/9

sub in eq 2

2x-2*-19/9=16

2x=16-38/9

x=144-38/18

x=106/18

=53/9