Question

 If 3P +Q =7 and 2P - Q = 8 then values of P and Q are​

Answer 1

P = 3 ; Q = -2

Step-by-step explanation:

Adding both the equations we get :

5P = 15 ( 3P + Q + 2P - Q = 15 )

P = 3 ( 15 ÷ 5 = Q )

Putting the value of P in equation 1 or 2 we get :

3×3 + Q = 7

Q = 7 - 9

Q = -2

Answer 2

Answer:

3p +Q = 7. ...

p = 7-Q /3. .....i

2p - Q = 8 ....ii

putting p in ... ii

2( 7 - Q/3) -Q = 8

14 - 2Q/3 - Q = 8

14 -2Q -3Q/3 =8

14-5Q = 8*3

-5Q = 24 -14

-Q = 10/5

Q =-2

p = 7- -2/3

=9/3