A class of 19 pupils has five more girls than boys. Let #n# the number of boys. What would be the equation that expresses the total number of students?

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Answer 1 · 2016-08-02T12:21:45

#n + (n+5) = 19#
Solving gives 7 boys and 12 girls.

First write an expression for the number of boys and
another for the number of girls.

Let the number of boys be #n#.
The number of girls is #n+5" there are 5 more girls than boys"#

There are 19 students altogether.
(Boys + girls makes 19)

#n + (n+5) = 19#

#2n + 5 = 19)

#2n = 19-5#

#2n = 14#

n = 7.