Question 278524
i dont know why that guy answered this so badly he didnt even get the right answer, but this is how its done:

{{{j+m=100}}}
{{{m-30=9(j-30)}}}
{{{m=100-j}}}
{{{(100-j)-30=9(j-30)}}}
{{{70-j=9j-270}}}
{{{70=10j-270}}}
{{{340=10j}}}
{{{highlight(34=j)}}}
{{{m=100-j}}}
{{{m=100-34}}}
{{{highlight(m=66)}}}