Question 344447
{{{-3a+b=0}}}
{{{b = 3a}}}

{{{3a - 4b = -22}}}
{{{3a - 4(3a) = -22}}}
{{{3a - 12a = -22}}}
{{{-9a = -22}}}
{{{a = 22/9}}}
Then use this value to solve for b
{{{-3(22/9) + b = 0}}}
{{{-22/3 + b = 0}}}
{{{b = 22/3}}}
Check your answer
does {{{3*(22/9) - 4*22/3 = -22}}}??