mamabarbie34 mamabarbie34

29-03-2020
Mathematics

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

Respuesta :

Hrishii Hrishii

29-03-2020

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:

[tex]x + 2x = 21 \\ \implies \: 3x = 21[/tex]

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