Question

Simplify the following expression.
x - 4y + 5z - 3x - y + 2z

2x - 5y + 7z

-2x - 5y - 7z

-2x - 5y + 7z

-2x - 5y + 3z

@mathslover , I forgot how to do these.

Answer 1

I believe it's A

Answer 2

-2x+7z-5y is the answer

Answer 3

yeah sorry, Hawaiian was right, it's -2

Answer 4

The method is first to collect like terms :

\(x - 4y + 5z - 3x - y + 2z
\)

\(\implies ( x - 3x ) + (-4y - y) + (5z + 2z) \)

Can you solve it now?

Answer 5

or -2x-5y +7z, so c

Answer 6

http://sketchtoy.com/32771052

Answer 7

Like that @mathslover ? ^

Answer 8

Yes.

Answer 9

You're right unheard, its -2x - 5y + 7z