Question 1019349
{{{A+B=180}}}
{{{A=(7/5)B}}}
Substituting,
{{{(7/5)B+B=180}}}
{{{(7/5)B+(5/5)B=180}}}
{{{(12/5)B=180}}}
{{{B=180(5/12)}}}
{{{B=75}}}
Then,
{{{A=(7/5)75}}}
{{{A=105}}}