Question

If 3x+2y = 3 and 3x-2y = 5 then the value of x+y =
a) 5 ​​​b) 3 ​​​c) 7

Answer 1

Answer:

3x+2y=3 "1"

3x-2y=5

4y=-2

y=-1/2

substitute value y in eqn 1

3x+2(-1/2)=3

3x-1/4=3

12x-1=12

12x=13

x=13/12 "3"

then

x+y

13/12+(-1/2)

13-6/12=0

7=0

x+y=7 ANS