Verified answer

First problem: 8x

Second problem: 7+2m+4n

Also, the algebraic expression of "twice the difference of x and 3" is...

2(x-3).

You can add x's and m's like you'd add apples and oranges.

x + 3x + 6x - 2x = 8x just count how many x's you have. x will

take on a value, like maybe 7, then you have 8 sevens.

4 + 2m - 5n + 3 + 9n = 7 + 2m + 4n

The expression "twice the diference of x and 3" is represented

as

2 * (x - 3)

1. X + 3x + 6x -2x = 8x

2. 4 + 2m -5n + 3 + 9n

Add like terms:

7 + 4n + 2m

The algebraic expression is: 2(x-3)

x+3x+6x-2x = 8x

4+2m-5n+3+9n = 7 + 2m + 4n

2(x - 3)

Question 1: 8x

Question 2: 2m + 4n + 7

Question 3: 2(x-3)

I am unsure about question 3, but that's what I would put.