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If: 3x = 21 then x = 7
Well, isn't that a happy little math problem! To find the number that, when multiplied by 400, equals 28000, we simply need to divide 28000 by 400. So, 28000 divided by 400 equals 70. So, the number you're looking for is 70. Happy calculating!
To find the number that, when multiplied by 3, equals 155, you would divide 155 by 3. So, 155 ÷ 3 = 51.6667. Therefore, the number that, when multiplied by 3, equals 155 is approximately 51.6667.
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To find the number that, when multiplied by 21, equals 100, you would divide 100 by 21. This calculation yields approximately 4.7619. Therefore, the number that, when multiplied by 21, equals 100 is approximately 4.7619.