To solve the problem, Addition and division property of the equality is applied.
What is the linear system?
A linear system is one in which the parameter in the equation has a degree of one. It might have one, two, or even more variables.
The equation is given below.
–x – 4 = 9
Add 4 on both sides, we have
–x – 4 + 4 = 9 + 4
–x = 13
Divide both side by –1, then we have
x = – 13
More about the linear system link is given below.
https://brainly.com/question/20379472
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