Question

answer this question fastly​

Answer 1

Answer:

Step-by-step explanation:

Add both the equation ,

2x+y =23

4x-y =19

Ans 6x =42. 2(7) + y =23

X=7. 14+y =23

Y =23-14

Y= 9

Subsitute the value of x and y

5(9)- 2(7)

45 -14

Ans :-31 (a) option

Answer 2

Answer:

The given equations are

2 x  +  y  =  23                              ...(i)

4 x  −  y  =  19                            ...(ii)

On adding (i) and (ii), we get

6 x  =  42     ⇒  x =  7

On putting  (  x =  7 ) in (i), we get

14  +  y = 23      ⇒  y  =  9

Now,  

5 y  −  2 x

=  5× 9 − 2 × 7   =    31