Explanation:
Hey there!
Here;
The equations are;


Multiplying equation (i) by 2.
16x + 14y = 78
4x - 14y = -68
20x = 10

x = 1/2.
Putting value of 'x' in equation (i).




Therefore the value of y is 5.
Check:
Put value of x and y in equation (i).
8x + 7y = 39



(True).
Therefore, the solution is ; (1/2,5).
Hope it helps...