If a+b=9 and x+y=1 what is - 3b-3y-3a-3x

Hello from MrBillDoesMath!

Answer:

-30

Discussion:

-3b - 3y - 3a - 3x = > (rearrange terms so a, b and x, y together)

-3a - 3b - 3x - 3y = > (factor 3 from each term)

-3 (a+b) - 3 (x+y) = > (substitute values provided by problem)

-3 (9) - 3 (1) = >

-27 - 3 = - 30

Regards,

MrB