Hey there!
1/4x = -5/8
MULTIPLY 4/1 to BOTH SIDES 
4/1 * 1/4x = -5/8 * 4/1
CANCEL out: 4/1 * 1/4 because it give you 1 
KEEP: -5/8 * 4/1 because it give you the x-value 
NEW EQUATION: x = -5/8 * 4/1
SIMPLIFY IT! 
x = -5/2 
Therefore, your answer is: x = -5/2
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)