-7u+31=-3(u+3)

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Solution for -7u+31=-3(u+3) equation:


Simplifying
-7u + 31 = -3(u + 3)

Reorder the terms:
31 + -7u = -3(u + 3)

Reorder the terms:
31 + -7u = -3(3 + u)
31 + -7u = (3 * -3 + u * -3)
31 + -7u = (-9 + -3u)

Solving
31 + -7u = -9 + -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.
31 + -7u + 3u = -9 + -3u + 3u

Combine like terms: -7u + 3u = -4u
31 + -4u = -9 + -3u + 3u

Combine like terms: -3u + 3u = 0
31 + -4u = -9 + 0
31 + -4u = -9

Add '-31' to each side of the equation.
31 + -31 + -4u = -9 + -31

Combine like terms: 31 + -31 = 0
0 + -4u = -9 + -31
-4u = -9 + -31

Combine like terms: -9 + -31 = -40
-4u = -40

Divide each side by '-4'.
u = 10

Simplifying
u = 10

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