Jerome bought 5 x 2 = <<5*2=10>>10 toy cars this month.

So he bought a total of 5 + 10 = <<5+10=15>>15 toy cars.

Therefore, Jerome had 40 - 15 = <<40-15=25>>25 toy cars originally.

# Answer

25
Question:
Jerome bought 5 new toy cars last month. This month he bought twice as many so that he has 40 toy cars now. How many toy cars did Jerome have originally?
Answer:
Let's think step by step.

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25
Jerome bought 5 new toy cars last month. This month he bought twice as many so that he has 40 toy cars now. How many toy cars did Jerome have originally?
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