Question 1098691
In three years,
{{{A+3=3(P+3)}}}
{{{A+3=3P+9}}}
1.{{{A-3P=6}}}
A year ago,
{{{A-1=7(P-1)}}}
{{{A-1=7P-7}}}
2.{{{A-7P=-6}}}
Subtracting eq. 2 from eq. 1,
{{{A-3P-A+7P=6+6}}}
{{{4P=12}}}
Solve for P then use either equation to solve for A.