Advanced MathEasyDividing a linear expression by a constant
Advanced Math practice question
The expression (18x − 12)/6 is equivalent to ax + b for constants a and b. What is the value of a + b?
Answer: 1
Divide each term by 6: 3x − 2. Then a + b = 3 + (−2) = 1.
Common wrong answers
- If you answered 3
- 3 is a alone; add b = −2.
- If you answered 5
- b is negative: 3 + (−2) = 1, not 3 + 2.
- If you answered -2
- −2 is b alone; add a = 3.
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