# Ahn has 64 crayons. This number is 18 more crayons than Bill has. Which equation should be used to find b, the number of crayons Bill has?

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Formula will be a+b=c

given: a=64

b=?

c=18

a+b=c

a-c=b

then, substitute the given

64-18=b

46=b

given: a=64

b=?

c=18

a+b=c

a-c=b

then, substitute the given

64-18=b

46=b

my formula is a -b - c = 0

a =64

b = ?

c = 18

solution: 64 - 18 = b

46 = b

Bill's crayons are 46 pcs.