u+21=5u-47

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Solution for u+21=5u-47 equation: 


Simplifying
u + 21 = 5u + -47

Reorder the terms:
21 + u = 5u + -47

Reorder the terms:
21 + u = -47 + 5u

Solving
21 + u = -47 + 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.
21 + u + -5u = -47 + 5u + -5u

Combine like terms: u + -5u = -4u
21 + -4u = -47 + 5u + -5u

Combine like terms: 5u + -5u = 0
21 + -4u = -47 + 0
21 + -4u = -47

Add '-21' to each side of the equation.
21 + -21 + -4u = -47 + -21

Combine like terms: 21 + -21 = 0
0 + -4u = -47 + -21
-4u = -47 + -21

Combine like terms: -47 + -21 = -68
-4u = -68

Divide each side by '-4'.
u = 17

Simplifying
u = 17

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