Advanced Math practice question

Answer: -13

3(2x − 5) − 4x = 6x − 15 − 4x = 2x − 15, so a + b = 2 + (−15) = −13.

Common wrong answers

If you answered 13

13 has the sign of b wrong.

If you answered -9

−9 uses 6 − 15 without subtracting 4x.

If you answered -3

−3 uses 2 − 5, forgetting to multiply the constant by 3.

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