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**The number of boys in ninth grade is 12 less than twice the number of girls.**

There are 51 students in ninth grade.

How many are girls?

**Answer**

[tex]b-boys\\g-girls\\\\ \left\{\begin{array}{ccc}b+g=51\\2g=b+12\end{array}

ight\\\\+\left\{\begin{array}{ccc}b+g=51\\2g-b=12\end{array}

ight\\----------\\.

\ \ \ \ \ \ 3g=63\ \ \ \ /:3\\.

\ \ \ \ \ \ g=21\\\\\ girls.

[/tex]

##### Virtual Teaching Assistant: John B.

##### Question Level: Basic

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##### Upload Date: 5/31/2017

This 27 words question was answered by John B. on StudySoup on 5/31/2017. The question contains content related to Math Since its upload, it has received 82 views.