Add :
$5 (x + y), 3 (x + 2 y), 5 (2 x - y)$

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Solution

$\begin{matrix} 5 (x + y), 3 (x + 2 y), 5 (2 x - y) a d d i t i o n \to \Rightarrow 5 x + 5 y + 3 x + 6 y + 10 x - 5 y \Rightarrow 18 x + 6 y \end{matrix}$

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Q. Solve the following system of equations by matrix method:
(i) 5x + 7y + 2 = 0
4x + 6y + 3 = 0

(ii) 5x + 2y = 3
3x + 2y = 5

(iii) 3x + 4y − 5 = 0
x − y + 3 = 0

(iv) 3x + y = 19
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Examine the consistency of the system of equations.

5x − y + 4z = 5

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Q. Add :

3 x - 5 y - 5 z

and

- 5 x - 2 y - 3

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Add :5(x+y), 3(x+2y), 5(2x−y)

5(x+y),3(x+2y),5(2x−y)addition→⇒5x+5y+3x+6y+10x−5y⇒18x+6y

Add :
$5 (x + y), 3 (x + 2 y), 5 (2 x - y)$

$\begin{matrix} 5 (x + y), 3 (x + 2 y), 5 (2 x - y) a d d i t i o n \to \Rightarrow 5 x + 5 y + 3 x + 6 y + 10 x - 5 y \Rightarrow 18 x + 6 y \end{matrix}$