Problema Solution
five-sevenths of a group of pupils are boys. There are 18 more than girls. How many pupils are there altogether?
Answer provided by our tutors
Let 'x' represent the number of pupils altogether.
(5/7)x = the number of boys
(5/7)x - 15 = the number of girls
(5/7)x + (5/7)x - 15 = x
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click here to see the equation solved for x
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x = 35 pupils
There are 35 pupils altogether.