Question 317263

{{{A=(7/10)B}}}
{{{A+4=(8/11)(B+4)}}}
{{{(7/10)B+4=(8/11)B+(32/11)}}}
{{{(7/10)B+(44/11)=(8/11)B+(32/11)}}}
{{{(7/10)B+(12/11)=(8/11)B}}} LCD 10*11=110
{{{(12/11)=(80/110)B-(77/110)B}}}
{{{(12/11)=(3/110)B}}} multiply by 110
{{{120=(3)B}}}divide by 3
{{{60=B}}}
bob is 60 years old
ann is 42 years old