Brandon has a certain amount of pencils, p. Sophie has 7 fewer pencils than Brandon. How do you write an expression that represents how many pencils Sophie has?

2 Answers
Nov 11, 2015

Compare the amount of Sophie's pencils to Brandon.


Brandons amount of pencils is #p#
Since Sophie has 7 less than Brandon, that means that she has #(p-7)# pencils.

Nov 11, 2015

S = p - 7 pencils

See explanation. The layout is very important for good mathematics


Let Brandon be B
Let Sophie be S
Given that Brandon's count of pencils is p

B = p pencils

(Note that units are important and 'pencils' is units of measurement/count)

Then S = p -7 pencils