Advanced MathEasyCoefficients after distributing
Advanced Math practice question
If 5(2x − 1) = ax + b for all values of x, where a and b are constants, what is the value of a − b?
Answer: 15
5(2x − 1) = 10x − 5, so a = 10, b = −5, and a − b = 15.
Common wrong answers
- If you answered 5
- 5 adds a and b instead of subtracting.
- If you answered 10
- 10 is a alone.
- If you answered -5
- −5 is b alone.
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