Question

Simplify the following expression:
x - 4y + 2z - 3x - 3y + 2z = ?

-2x + 7y + 4z

-2x -7y + 4z

-3x + 7y + 4z

-3y - 7z + 4z

Answer 1

You can change the order to make it easier

x - 4y + 2z - 3x - 3y + 2z
put together all the x's y's and z's
x - 3x - 4y -3y + 2z + 2z

Answer 2

then just combine all the like terms... eg x-3x becomes -2x

Answer 3

@LickMyKicks

one at a time:

x - 3x - 4y -3y + 2z + 2z

x-3x is -2x...

-2x - 4y -3y + 2z + 2z

-4y -3y is -7y:

-2x - 7y + 2z + 2z

2z + 2z is 4z:

-2x - 7y + 4z

Answer 4

thank you soooooooooooo much!