We have to find the sum of (7x-6y) and (x+y)
(7x-6y) and (x+y) are two Algebraic expressions
Sum of two algebraic expressions is also a algebraic expression
So, (7x - 6y) + (x+y) = 7x - 6y + x + y
= 7x + x + y - 6y
= x (7 + 1) + y - 6y
= 8x + y - 6y
= 8x + y ( 1 - 6 )
= 8x + y ( -5 )
= 8x - 5y
Hope this helps..!!
Thank you :)