Answer:
Let's solve this step by step.
Given:
| x 7 | = -18
| 2 4 |
We have a 2x2 matrix with absolute values, and we know that the determinant of a 2x2 matrix [a b; c d] is given by: determinant = ad - bc.
So, in this case, we have:
x * 4 - 7 * 2 = -18
Simplify the equation:
4x - 14 = -18
Now, isolate x:
4x = -18 + 14
4x = -4
x = -4 / 4
x = -1
So, the value of x is -1.
Step-by-step explanation:
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Answers & Comments
Answer:
Let's solve this step by step.
Given:
| x 7 | = -18
| 2 4 |
We have a 2x2 matrix with absolute values, and we know that the determinant of a 2x2 matrix [a b; c d] is given by: determinant = ad - bc.
So, in this case, we have:
x * 4 - 7 * 2 = -18
Simplify the equation:
4x - 14 = -18
Now, isolate x:
4x = -18 + 14
4x = -4
x = -4 / 4
x = -1
So, the value of x is -1.
Step-by-step explanation: