Question

{5x+ 7y = 16 {20x + 28y = 64

Answer 1

5x + 7y = 16 *(-4)

2x + 28y = 64

-20x - 28y = -64

2x + 28y = 64

-18x = 0

x = 0/-18

x = 0

20x + 28y = 64

20*(0) + 28y = 64

0 + 28y = 64

28y = 64

y = 64/28

y = 16/7

(0, 16/7)