True. Do you have a question regarding this?
Answer: x = −12
Step-by-step explanation:
−27 = x −15
x − 15 = −27
x − 15 + 15 = −27 + 15
x = −12
There are many strategies that can be used it really depends on what kind of questions you're answering.
Answer:

Explanation: You had to used pemdas stands for: p-parenthesis, e-exponents, m-multiply, d-divide, a-add, and s-subtracting that came from left to right.
First you had to multiply and divide from left to right.



Then you add and subtract from left to right.


Final answer: 
Hope this helps!
And thank you for posting your question at here on brainly, and have a great day.
-Charlie