Question 337486
{{{(3/9)(a-b)+(4/9)b=(3/9)a-(3/9)b+(4/9)b}}}
{{{(3/9)(a-b)+(4/9)b=(3/9)a+((-3+4)/9)b}}}
{{{(3/9)(a-b)+(4/9)b=(1/3)a-(1/9)b}}}