Answer:
its 1/2 or 0.5 
Explanation:
5(6x + -3y) = 0 
(6x * 5 + -3y * 5) = 0 
(30x + -15y) = 0 
 
Solving 
30x + -15y = 0 
 
Solving for variable 'x'. 
 
Move all terms containing x to the left, all other terms to the right. 
 
Add '15y' to each side of the equation. 
30x + -15y + 15y = 0 + 15y 
 
Combine like terms: -15y + 15y = 0 
30x + 0 = 0 + 15y 
30x = 0 + 15y 
Remove the zero: 
30x = 15y 
 
Divide each side by '30'. 
x = 0.5y 
 
Simplifying 
x = 0.5y