Question

Subtract: (In horizontal and in vertical arrangement).

(3) (4x − 5y + 6z) − (3z + 4y − x)

Answer 1

Horizontal arrangement:
(4x − 5y + 6z) − (3z + 4y − x)
= 4x − 5y + 6z − 3z − 4y + x

Combining the like terms, we get:
4x + x − 5y − 4y + 6z − 3z
= 5x − 9y + 3z

Vertical arrangement:
Writing the like terms one below the other, we get:
$\begin{array}{cccccc}& 4x& -& 5y& +& 6z\\ -& (-x& +& 4y& +& 3z)\end{array}$

Now, we have:

$\begin{array}{cccccc}& 4x& -& 5y& +& 6z\\ +& x& -& 4y& -& 3z\\ & 5x& -& 9y& +& 3z\end{array}$