The value of x when y = 18 is -6.
Concept:
- Here as x & y are directly proportional, [tex]\frac{x}{y} = k[/tex]
How to solve the given question?
- As x & y are directly proportional, [tex]\frac{x}{y} = k[/tex]
∴ [tex]\frac{x_1}{y_1} = \frac{x_2}{y_2}[/tex]
∴ [tex]\frac{x}{18}=\frac{3}{-9}[/tex]
∴ x = [tex]\frac{3}{-9}[/tex] × 18
∴ x = -6
Thus the value of x when y = 18 is -6.
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