31=3u+2(u-2)

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Solution for 31=3u+2(u-2) equation:


Simplifying
31 = 3u + 2(u + -2)

Reorder the terms:
31 = 3u + 2(-2 + u)
31 = 3u + (-2 * 2 + u * 2)
31 = 3u + (-4 + 2u)

Reorder the terms:
31 = -4 + 3u + 2u

Combine like terms: 3u + 2u = 5u
31 = -4 + 5u

Solving
31 = -4 + 5u

Solving for variable 'u'.

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

Add '-5u' to each side of the equation.
31 + -5u = -4 + 5u + -5u

Combine like terms: 5u + -5u = 0
31 + -5u = -4 + 0
31 + -5u = -4

Add '-31' to each side of the equation.
31 + -31 + -5u = -4 + -31

Combine like terms: 31 + -31 = 0
0 + -5u = -4 + -31
-5u = -4 + -31

Combine like terms: -4 + -31 = -35
-5u = -35

Divide each side by '-5'.
u = 7

Simplifying
u = 7

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