Answer:
x = 3/8
Explanation:
You want the solution to 3/2 = 4x.
One-step equation
You solve this one-step linear equation by multiplying both sides by the inverse of the x-coefficient:

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Additional comment
The "one step" is multiplying both sides by 1/4. The rest is simplifying the result.
Of course, this is the same as dividing both sides by 4. The result is x = (3/2)÷4 = 3/(2·4) = 3/8.