Question 721035
Call b the number of boys and g the number of girls.<P>
b + g = 94 and b = 4g + 9 (is means =, four times the number means multiply by 4, and 9 more than means add 9.)<P>
Substitute 4g+9 for b in the first equation, because the second equation indicates that's what b =.<P>
4g + 9 + g = 94 ---> 5g = 85 (added the g's, and subtracted 9 from both sides).<P>
g = 17 (divided both sides by 5.)<P>
b+17=94 ---> b = 77 (subtracted 17 from both sides).
<P>Hope the solution helped.  Sometimes you need more than a solution.  Contact fcabanski@hotmail.com for online, private tutoring, or personalized problem solving (quick for groups of problems.)