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PLEASE HELP TIMED TEST What is the value of x in the matrix equation below?

3
-21
8
х
10
N
3
-1
-7
-4
-3
-1
.

PLEASE HELP TIMED TEST What is the value of x in the matrix equation below? 3 -21 8 х-example-1
User Orfa
by
8.5k points

1 Answer

5 votes

Answer:

x = 1

Explanation:

Given the matrix;


-2\left[\begin{array}{ccc}x&-1\\3&5\end{array}\right] + \left[\begin{array}{ccc}3&8\\-1&6\end{array}\right] = \left[\begin{array}{ccc}x&10\\-7&-4\end{array}\right]

Converting to equations

From the first row of each matrices

-2x + 3 = x

Collect the like terms

-2x - x = -3

-3x = -3

x = -3/-3

x = 1

Hence the value of x is 1

User Hivenfour
by
8.7k points

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