Question

= 189) solve 2x+3y = 12, x + 3y = 9 in.
Substitution method ​

Answer 1

Answer:hey there mate !

Step-by-step explanation:

2x+3y=12 ..............eqn-1

x+3y=9 .............eqn-2

x=(12-3y)/2 ..........eqn-3

Put this eqn-3 in eqn-2,

(12-3y)/2 +3y = 9

12-3y+6y=18

12+3y=18

3y=6

y=2

Now , x+3(2)=9

x=3

So x=3 and y=2