Question 1069772
1.{{{A+C=9}}}
2{{{8A+3.5C=54}}}
From 1,
{{{A=9-C}}}
Substituting,
{{{8(9-C)+3.5C=54}}}
{{{72-8C+3.5C=54}}}
{{{-4.5C=-18}}}
Now solve for C then use either equation to solve for A.