Solve for $u$ .
$\begin{array}{l} - 12 = 4 (u - 20) \\ u = ◻ \end{array}$

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Answer

Doing these steps, we find that the solution to the equation is $17$ .

Steps

Step 1 ：The equation is in the form of ax = b, where a is the coefficient of the variable, x is the variable and b is the constant. In this case, a = 4, x = u - 20 and b = -12.

Step 2 ：To solve for u, we need to isolate u on one side of the equation. We can do this by first dividing both sides of the equation by 4 to get rid of the coefficient of u.

Step 3 ：Then, we add 20 to both sides to isolate u.

Step 4 ：Doing these steps, we find that the solution to the equation is $17$ .

Solve for u.−12=4(u−20)u=◻

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Solve for $u$ .
$\begin{array}{l} - 12 = 4 (u - 20) \\ u = ◻ \end{array}$