Question 372895
{{{-5/4 = (-2--7)/(0-x)}}},
{{{-5/4 = 5/(-x)}}}, 
{{{5/4 = 5/x}}}, after cancellation of the negative sign.
{{{1/4 = 1/x}}}, after dividing both sides by 5
x = 4, after taking reciprocals of both sides.