3u+8=4u-1

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Solution for 3u+8=4u-1 equation:


Simplifying
3u + 8 = 4u + -1

Reorder the terms:
8 + 3u = 4u + -1

Reorder the terms:
8 + 3u = -1 + 4u

Solving
8 + 3u = -1 + 4u

Solving for variable 'u'.

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

Add '-4u' to each side of the equation.
8 + 3u + -4u = -1 + 4u + -4u

Combine like terms: 3u + -4u = -1u
8 + -1u = -1 + 4u + -4u

Combine like terms: 4u + -4u = 0
8 + -1u = -1 + 0
8 + -1u = -1

Add '-8' to each side of the equation.
8 + -8 + -1u = -1 + -8

Combine like terms: 8 + -8 = 0
0 + -1u = -1 + -8
-1u = -1 + -8

Combine like terms: -1 + -8 = -9
-1u = -9

Divide each side by '-1'.
u = 9

Simplifying
u = 9

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