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AlgebraEasyTwo numbers from their sum and difference

Algebra practice question

Two numbers have a sum of 7 and a difference of 1. What is the smaller number?

Answer: 3

a + b = 7 and a − b = 1 give a = 4 and b = 3.

Common wrong answers

If you answered 4
4 is the larger number.
If you answered 6
6 subtracts 1 from 7.
If you answered 3.5
3.5 halves 7.

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