Question

Срочно нужна помогите??? ​

Answer 1

3*(a+6) = 3*a + 3*6 = 3a + 18

12*(x-3y) = 12*x - 12*3y = 12x - 36y

100*(47a+93b-78) = 100*47a + 100*93b - 100*78 = 4700a + 9300b - 7800