The correct answer is D. Step 4.
In step 4, Mia divided by -2 without properly flipping the inequality sign. When dividing by a negative number, the direction of the inequality should be reversed. Therefore, the correct step should be x < -3, not x > -3.
Step 1: 4x + 5 < 6x + 1 (Given)
Step 2: -2x + 5 < 1 (Subtraction)
Step 3: -2x < 6 (Addition)
Step 4: x > -3 (Division)
Mia is trying to find her mistake in the problem shown. In which step did she first make a mistake?
A. Step 1
B. Step 2
C. Step 3
D. Step 4
1 answer
1 answer