Question 324380
{{{1/(t + 2) = (t - 1)/(t + 7)}}}
Multiply both sides by {{{(t+2)(t+7)}}},
{{{t+7=(t-1)(t+2)}}}
{{{t+7=t^2+2t-t-2}}}
{{{t+7=t^2+t-2}}}
{{{t^2-9=0}}}
{{{t^2=9}}}
{{{t=0 +- 3}}}