1+u=3u-15

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Solution for 1+u=3u-15 equation:


Simplifying
1 + u = 3u + -15

Reorder the terms:
1 + u = -15 + 3u

Solving
1 + u = -15 + 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.
1 + u + -3u = -15 + 3u + -3u

Combine like terms: u + -3u = -2u
1 + -2u = -15 + 3u + -3u

Combine like terms: 3u + -3u = 0
1 + -2u = -15 + 0
1 + -2u = -15

Add '-1' to each side of the equation.
1 + -1 + -2u = -15 + -1

Combine like terms: 1 + -1 = 0
0 + -2u = -15 + -1
-2u = -15 + -1

Combine like terms: -15 + -1 = -16
-2u = -16

Divide each side by '-2'.
u = 8

Simplifying
u = 8

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