<PRE><B>Question 763111</B>
27 kids means 27 cones.

Let u = how many 2 dip cones
Let v = how many 3 dip cones


Accounting for cones, {{{u+v=27}}}


Accounting for dips, {{{2*u+3*v=70}}}
In case confusion how this one works, 2 dips per cone multiplied by how many 2-dip cones PLUS 3 dips per cone multiplied by how many 3-dip cones IS 70 dips.


Solve this system for u and v:
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{u+v=27}
{2u+3v=70}
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Solve however you want.  A way is, multiply the first equation by 2 and subtract from the second equation, and solve first for v.
then,...</PRE>