中等math-u05-d01
Solve the inequality 3x - 7 > 2x + 5 for x.
A. x > 12✓ 答案
B. x > 2
C. x < 12
D. x < 2
解說
Subtract 2x and add 7 on both sides: x > 12. Because no negative factor was used, the inequality sign is unchanged.
Subtract 2x and add 7 on both sides: x > 12. Because no negative factor was used, the inequality sign is unchanged.