Respuesta :

wegnerkolmp2741o

3/10 N = 2.1

MULTIPLY  by 10/3 to each side

10/3 * 3/10  n = 2.1 * 10 /3

n = 2.1 * 10/3

n = 21/3

n =7

Answer:

The number is 7.

Step-by-step explanation:

Let the number be x.

Three tenths of a number is 2.1 .

Mathematically we can denote this as:

[tex]\frac{3}{10}\times x=2.1[/tex]

Now solving for x, we have ;

[tex]3x=2.1\times10[/tex]

[tex]3x=21[/tex]

Dividing both sides by 3;

x = 7

Hence, the number is 7.

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