Question

a) If x = a + 7 and y = b-a, show that x + y = b + 7. ​

Answer 1

Step-by-step explanation:

x = a + 7

y = b-a

To prove

x + y = b + 7.

1. x+y= (a+7) + (b-a)

=a+7+b-a

=a-a+7+b

=0 + 7+b

= b+7

Proved ✅