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There are 29 students in Ms. Wong's class. There are 3 fewer girls than boys. Write the system of equations that can be used to find how many of each student are in Ms. Wong's class. Let g represent the girls and b represent the boy

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irspow
g=b-3 and c=29=b+g  substituting the first into the second gives you...

b+(b-3)=29

2b-3=29  add 3 to both sides

2b=32 divide both sides by 2

b=16

So there were 16 boys and (29-16) 13 girls in Ms. Wong's class.