Question

3/x=5/10-2

Answer 1

3/x = 5/10 - 2,

3/x = 1/2 - 4/2,
3/x = - 3/2,
Invert both side,
x/3 = - 2/3,
Multiply both sides by 3:
x = - 6/3,
x = -2.