Can you me with this problems 1. 3 ( x + y )= and 2. 7d + ( d + 8 ) - 6 = .

The answer for 1.3 (x+y)=
you first multiply 1.3 times x then 1.3 times y so you end up with 1.3x +1.3y

and for the second problem is 2.7d+d+8-6=
(2.7d+d)+(8-6)
3.7d+2

1. 3(x+y)
3x+3y
you can't add x and y because they are different variables.

2. 7d+(d+8)-6
7d+d+8-6
8d+8-6
8d+2
you can't add 8d and 2 because they have different variables. 2 doesn't have a variable and 8 does so they can't be combined.