Question 591962
Let {{{ a }}} = amount salesperson A earns in 3 yrs
Let {{{ b }}} = amount salesperson B earns in 3 yrs
Let {{{ c }}} = amount salesperson C earns in 3 yrs
given:
(1) {{{ a = 2b }}}
(2) {{{ b = 1.5c }}}
(3) {{{ a + b + c = 220000 }}}
-------------------
(2) {{{ c = b/1.5 }}}
By substitution
{{{ 2b + b + b/1.5 = 220000 }}}
{{{ 3b + 1.5b + b = 330000 }}}
{{{ 5.5b = 330000 }}}
{{{ b = 60000 }}}
and
(1) {{{ a = 2b }}}
{{{ a = 120000 }}}
and
{{{ c = b/1.5 }}}
{{{ c = 40000 }}}
--------------
 {{{ 60000/3 = 20000 }}}
Salesperson B averaged $ 20,000 per yr