Question

3x + 2x -x

3(x+3)

6 x - 3 + 2(x-9)

All separate questions

Answer 1

3x + 2x - x = 4x

3(x+3) = 3x + 9

6x - 3 + 2(x-9) = 8x - 21

Explanation:

For the first question, we add 3x and 2x, getting 5x, then subtract x, getting 4x.

For the second question, we distribute 3 to the part in parentheses, getting us the new expression, 3x+9.

For the last question, first we need to distribute 2. We then get 6x - 3 + 2x - 18. We can then combine like terms, and we get 8x - 21.

Answer 2

1. 4x

2. 3x+9

3. 8x-21

Explanation:

1. Combine like terms (3x)+(2x)(-x)

2. 3(x+3)

3x+9

3. 6x-3+2(x-9)

6x-3+2x-18

6x-3+2x-18

6x-21+2x

6x-21+2x

8x-21