Question

1. If 3x + 2y = 13 and 3x – 2y = 5, then the value of x + y is:
(a) 5 (b)3 (c)7

Answer 1

Answer:

5

Step-by-step explanation:

add the equations

6x=18

x=3

put the value of x in eq 1

9+2y=13

2y=4

y=2

x+y=5

Answer 2

Answer:

5, as you see that

x=13/6y. -(1)

then by the second equation

put the value of x from the equation (1)

3×13/6y-2y=5

y is 2

hence x=3

and x+y =5