4(2y-6) + 3(6y+3)
Take one bracket at a time
Start with 4(2y-6)
The 4 is outside of the bracket, so you times everything on the inside of the bracket by that number
4x2 = 8
And 4x6 = 24
So 4(2y-6) = 8y-24
And the second bracket is 3(6y+3)
Do the same thing and times everything on the inside of the bracket by the number of the inside
3x6 = 18
3x3 = 9
So 3(6y+3) = 18y+9
Now you have the total equation of 8y - 24 + 18y + 9
All numbers that have a "y" behind it add together
So 8y+18y = 26y
And all the numbers that don't also add together
So -24+9 (or 9-24) = -15
Now you are left with 26y-15