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Artyom0805 [142]
3 years ago
10

Write as a mathematical expression and solve. The sum of a number and 2 times the number is 21. Find the number.

Mathematics
1 answer:
igomit [66]3 years ago
5 0

Answer:

x + 2x = 21

Or

3x = 21

Step-by-step explanation:

Let the required number be x.

Two times of the number = 2x

Above statement in Mathematical form can be expressed as:

x + 2x = 21 \\  \implies \: 3x = 21

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