Step-by-step explanation:
If you want to multiply a parenthesis by a number, you simply distribute the number to all the terms in the parenthesis.
So, if you want to multiply the parenthesis
(3xโ7) by 5, you need to multiply by 5
both 3x and โ7.
We have that 5โ
(3x)=5โ
(3โ
x)=(5โ
3)โ
x=15x and โ7โ
5=โ35
So, 5(3xโ7)=15xโ35