Question

the solution of pair of equation y=2x and 7x-2y=21 is. a)x=7,y=14. b)x=14,y=7. c)x=7,y=7. d)none of these​

Answer 1

Answer:

x = 7, y = 14

Step-by-step explanation:

y = 2x

7x - 2y = 21

7x - 2(2x) = 21

7x - 4x = 21

3x = 21

x =21/3

x = 7

y = 2x

y = 2(7)

y = 14