Answer:
-397
Step-by-step explanation:
This may look daunting, but let us approach it step by step.
Step 1: Remove the Parentheses
multiply 1/10 by x - 3
0.1x - 0.3 = -40
Step 2: Add 0.3
In algebra, the goal is always to undo all the operations and get back to the original problem so that the mystery value can be determined. In this case since 0.3 was removed, we must add it back.
0.1x = -39.7
Step 3. Divide by 0.1
0.1x/0.1 = x
39.7/0.1 = -397
Step 4. Preliminary Answer
Answer seems to be B. -397, but we should still check it.
Step 5: Check
0.1(-397) - 0.3 = -40
-39.7 - 0.3 = -40
-40 = -40 Correct
If the answer was incorrect, this would show that there had been a flaw in our calculations. But everything checks out, so we are done!
Step 6: Final Answer
Our final answer is B. -397.
PLEASE MARK BRAINLIEST
