# Math

A particular Chemistry book costs \$6 less than a particular Physics book. Two such Chemistry books
and three such Physics books cost a total of \$123. Construct two simultaneous equations and solve
them using the substitution method. Show your working.

I just need help constructing the simultaneous equations. I should be fine with solving them, thank you :)

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1. Just turn the words into math.

A particular Chemistry book costs \$6 less than a particular Physics book
c = p-6

Two Chemistry books and three Physics books cost \$123
2c+3p = 123

now substitute and crank it out

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posted by Steve
2. Thank you :)

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