Answer:
x = 9
Explanation:
You want the value of x that satisfies 6/40 = x/60.
One-step equation
This equation can be solved in one step: multiply by the inverse of the coefficient of x.
The coefficient of x is 1/60. Its inverse is 60/1 = 60. Multiplying the equation by 60 gives ...
60(6/40) = 60(x/60)
360/40 = x
9 = x
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Additional comment
Often, you will be advised to "cross multiply" as the first step in solving a proportion. Doing this would give you ...
6(60) = 40(x)
Now, you would need to divide by the coefficient of x (or multiply by its inverse).
6(60)/40 = (40x)/40
360/40 = x = 9
This accomplishes in two steps what we did above in one step.