Question 155678
Let J be what Jim earns and A what Alicia earns.
1.{{{J=(2/3)A}}}
2.{{{J+A=600}}}
Substitute eq.1 into eq. 2,
{{{J+A=600}}}
{{{(2/3)A+A=600}}}
{{{(2/3)A+(3/3)A=600}}}
{{{((2+3)/3)A=600}}}
{{{(5/3)A=600}}}
{{{A=600(3/5)}}}
{{{highlight(A=360)}}}
From 1,
{{{J=(2/3)A}}}
{{{J=(2/3)360}}}
{{{highlight(J=240)}}}