8u+3(u+4)=-21

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Solution for 8u+3(u+4)=-21 equation:


Simplifying
8u + 3(u + 4) = -21

Reorder the terms:
8u + 3(4 + u) = -21
8u + (4 * 3 + u * 3) = -21
8u + (12 + 3u) = -21

Reorder the terms:
12 + 8u + 3u = -21

Combine like terms: 8u + 3u = 11u
12 + 11u = -21

Solving
12 + 11u = -21

Solving for variable 'u'.

Move all terms containing u to the left, all other terms to the right.

Add '-12' to each side of the equation.
12 + -12 + 11u = -21 + -12

Combine like terms: 12 + -12 = 0
0 + 11u = -21 + -12
11u = -21 + -12

Combine like terms: -21 + -12 = -33
11u = -33

Divide each side by '11'.
u = -3

Simplifying
u = -3

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