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andreev551 [17]
2 years ago
14

There are boys and girls in a class in the ratio 1: 12 there are 77 more girls than boys. how many boys are there?

Mathematics
1 answer:
Elanso [62]2 years ago
5 0

<u>Let's set up some variables</u>:

  • b: # of boys
  • g: # of girls

<u>Let's set up some equations based on the informative given</u>:

  • boys to girls ratio ⇒ 1: 12

             (M<em>athematical form)</em> g = 12b

  • 77 more girls than boys

             (<em>Mathematical form) </em>g = b + 77

<u>Let's put the equation together</u>:

 g = 12b         -- equation 1

 g = b + 77     -- equation 2

  (equation 2)'s value of g into (equation 1)

  12b = b + 77

   11b = 77

    b = 7

There are 7 boys.

<u>Answer: 7 boys</u>

<u></u>

Hope that helps!

#LearnwithBrainly

 

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