Question

3x+3y ; -18n-12m ; 16a-64b ;

Answer 1

3(х+у)
-6( 3n+2m)
16(a-4b)

Answer 2

3x+3y=3+3×(x+y)
18n-12m=18-12×(n+m)
так

Answer 3

It seems like you've provided three mathematical expressions, each with two variables. If you would like to simplify or solve these expressions, please specify what you would like to do with them. Here are the expressions you've provided:

1. 3x + 3y
2. -18n - 12m
3. 16a - 64b

If you have a specific question or task related to these expressions, please let me know, and I'll be happy to assist you further.