1-4(u-1)=21

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Solution for 1-4(u-1)=21 equation: 


Simplifying
1 + -4(u + -1) = 21

Reorder the terms:
1 + -4(-1 + u) = 21
1 + (-1 * -4 + u * -4) = 21
1 + (4 + -4u) = 21

Combine like terms: 1 + 4 = 5
5 + -4u = 21

Solving
5 + -4u = 21

Solving for variable 'u'.

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

Add '-5' to each side of the equation.
5 + -5 + -4u = 21 + -5

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

Combine like terms: 21 + -5 = 16
-4u = 16

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

Simplifying
u = -4

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