16Hit1600
AlgebraEasyStamps after buying more

Algebra practice question

Omar had some stamps. After buying 7 more he had 19. How many stamps did he have to begin with?

Answer: 12

s + 7 = 19 gives s = 12.

Common wrong answers

If you answered 7
7 is the number bought.
If you answered 19
19 is the total afterwards.
If you answered 26
26 adds 7 instead of subtracting.

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