Which expressions are equivalent to 6 + 12x ?
3(2 + 4x)
3(2 + 6x) + 2x
5(1 + 2x) + 1 + 2x
7(1 + 2x) - 2x - 1
7(1 + 2x) + 2x - 1

3(2 + 4x) = 6+ 12x

You have to multiply the number outside the parentheses with the numbers inside the parentheses

3(2 + 4x)

3 times 2 is 6

3 times 4x is 12x

=6+12

*I hope I helped you!*

step-by-step explanation:

mean or average is 40.6

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7