Question 894000
{{{A+B=34}}}
{{{B=3A-5}}}
Substitute into the first equation.
{{{A+(3A-5)=34}}}
{{{4A-5=34}}}
{{{4A=39}}}
{{{highlight(A=39/4)}}}
Then,
{{{B=3(39/4)-5}}}
{{{B=117/4-20/4}}}
{{{highlight(B=97/4)}}}