Question

Which expression is equivalent to 12 x + 3y - 9 x A. 12x - 6y B. X + y C. 6xy D. 3x + 3y

Answer 1

In this case we have the expression

`12x+3y-9x`

We can group the terms that are accompanied with x, having the final equivalent expression:

`(12-9)x+3y`

Remember to be careful with the signs.

`3x+3y`

Answer: D. 3x+3y