Question 948225
1.{{{3S+M=825}}}
2.{{{S+2M=525}}}
From eq. 1,
{{{6S+2M=1650}}}
Now subtract eq. 2 from this to eliminate M.
{{{6S+2M-S-2M=1650-525}}}
{{{5S=1125}}}
{{{S=225}}}
Then,
{{{225+2M=525}}}
{{{2M=300}}}
{{{M=150}}}
Milkshakes are $1.50 and sausage sandwiches are $2.25.