we can write an equation from the statement
All together, Michael and his two friends have exactly $30 to spend on lunch. Hot dogs cost 3.50 and drinks cost $1.50
[tex]3.50h+1.50d=30[/tex]
where h is the number of hot dogs and d the number of drinks
if they each get two hot dogs
then replace h=2x3=6
[tex]\begin{gathered} 3.50(6)+1.50d=30 \\ 21+1.50d=30 \end{gathered}[/tex]
then to find the number of drinks we solve d
[tex]\begin{gathered} 21+1.50d=30 \\ 1.50d=30-21 \\ 1.50d=9 \\ d=\frac{9}{1.50} \\ \\ d=6 \end{gathered}[/tex]
they can buy 6 drinks
