josephdigregorio99 josephdigregorio99
  • 22-07-2019
  • Mathematics
contestada

Two-thirds of the children in the fourth - grade class are girls. If there are 18 girls, what is the total number of children in the class?

Respuesta :

carlosego
carlosego carlosego
  • 29-07-2019

For this case, the first thing to do is define a variable.

We have then:

  • x: total number of children

Then we write the equation that models the problem:

[tex]\frac {2} {3} x = 18[/tex]

From here, we clear the value of x.

We have then:

[tex]x = \frac {3} {2} (18)\\x = 3 * 9\\x = 27[/tex]

Answer:

 the total number of children in the class is:

[tex]x = 27[/tex]

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