Question

Find the number of integer solutions of x+y = 18, and x-y = 7?

Answer 1

Answer:

x=12.5 ,  y=5.5

Step-by-step explanation:

x+y = 18......................eq1

x-y = 7......................eq2

adding eq1 and eq2

x+y = 18

x-y = 7

2x=25

x=25/2

x=12.5

putting x=12.5 in eq1

12.5+y=18

y=18-12.5

y=5.5