Question 1129446
Try to pick one variable to what you believe is most convenient and then write the other "expenditure" expressions.
<pre>
ANIMALS       EXPENDITURES
Dog
Cat
Bird               b
SUM               318
</pre>


The average expenditure per dog exceeded the sum of the averages for cats and birds by &#8203;$98. The amount spent per cat was ten times the amount spent per bird. Find the average amount spent on each type of animal. 
<pre>
ANIMALS       EXPENDITURES
Dog            10b+b+98
Cat               10b
Bird               b
SUM               318
</pre>
{{{22b+98=318}}}
{{{11b+49=159}}}
{{{11b=110}}}
{{{highlight_green(b=10)}}}
Find the other two.