Question

solve for (u).

(7 + 4u=-21)

simplify your answer as much as possible.

(u=)

Explanation:

Step1: Isolate the term with u

Subtract 7 from both sides of the equation:
$7 + 4u-7=-21 - 7$
$4u=-28$

Step2: Solve for u

Divide both sides of the equation by 4:
$\frac{4u}{4}=\frac{-28}{4}$
$u = - 7$

Answer:

$u=-7$