Question

Solve 2x-3y=13 and 7x-2y=20 by substitution method​

Answer 1

Answer:

x= 2

y = -3

Step-by-step explanation:

2x-3y= 13

x= 13+3y/2....

7x-2y= 20

Putting the value of x from above equation,

7(13+3y/2)-2y= 20

y= -3

x = 2

HOPE IT HELPS..

Answer 2

by substitution method

from eq.1

2x - 3y = 13

x = 13 + 3y / 2

put the value of x in eq. 2

7x - 2y = 20

7(13 + 3y \ 2 ) - 2y = 20

91 /2 + 21y \2- 2 y =20

21y - 4y \2 =20 -91\2

17y\2 = 40 - 91 \2

17y =-51

y = -3

put the value of y in eq.3

x = 13 - 9\ 2

x = 2