Question

find the value of x​

Answer 1

Answer:

x = 2

Step-by-step explanation:

y = -2

2x-y = 6

2x-(-2) = 6

2x+2 = 6

2x = 6-2

2x = 4

x = 4/2

x = 2

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Answer 2

Solution :-

$\Bigg[\begin{array}{cc} \sf 2x-y&\sf 5\\ \sf 3 & \sf y \end{array}\Bigg]=\Bigg[\begin{array}{cc}\sf 6&\sf 5\\\sf 3&\sf -2\end{array}\Bigg]$

We need to find the value of ‘x’

By comparing the matrices ,

Comparision of matrices :- If two matrices are equal then the elements in the matrices are equal to the elements of the matrix which are equal .

$\bullet\;\sf 2x - y = 6 ....\textcircled{\tiny\sf 1}$

$\bullet\;\sf 5 = 5$

$\bullet\;\sf 3 = 3$

$\sf\bullet \;\boxed{\texbf{\textsf{y =-2 }}}....\textcircled{\tiny\sf 2}$

By substituting the value of y in equation $\textcircled{\tiny\bf 1}$

$\sf \longrightarrow 2x - y = 6$

$\sf\longrightarrow 2x - ( - 2) = 6$

$\sf\longrightarrow 2x+2=6$

$\sf\longrightarrow 2x = 6 - 2$

$\sf\longrightarrow 2x = 4$

$\sf\longrightarrow x = \dfrac{4}{2}$

$\longrightarrow \boxed{\textbf{\textsf{x = 2}}}$