4(u+7)=-3u-21

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Solution for 4(u+7)=-3u-21 equation:


Simplifying
4(u + 7) = -3u + -21

Reorder the terms:
4(7 + u) = -3u + -21
(7 * 4 + u * 4) = -3u + -21
(28 + 4u) = -3u + -21

Reorder the terms:
28 + 4u = -21 + -3u

Solving
28 + 4u = -21 + -3u

Solving for variable 'u'.

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

Add '3u' to each side of the equation.
28 + 4u + 3u = -21 + -3u + 3u

Combine like terms: 4u + 3u = 7u
28 + 7u = -21 + -3u + 3u

Combine like terms: -3u + 3u = 0
28 + 7u = -21 + 0
28 + 7u = -21

Add '-28' to each side of the equation.
28 + -28 + 7u = -21 + -28

Combine like terms: 28 + -28 = 0
0 + 7u = -21 + -28
7u = -21 + -28

Combine like terms: -21 + -28 = -49
7u = -49

Divide each side by '7'.
u = -7

Simplifying
u = -7

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