Question

A gift shop had 500 coloring pencils. The shop sold 3 sets of 20 coloring pencils, 6 sets of 12 coloring pencils, and 10 sets of 18 coloring pencils. Write a numerical expression to show how many coloring pencils are left. Evaluate the numerical expression using order of operations. Show your work.

Answer 1

500=x+3(20)+6(12)+10(18)
x=unknown
500=x+60+72+180
500=x+312
-312 -312
188=x

Answer 2

500-(3*20)-(6*12)-(10*18)=188 pencils left