5(x-1)-1=-21

Solution for 5(x-1)-1=-21 equation:

Simplifying
5(x + -1) + -1 = -21

Reorder the terms:
5(-1 + x) + -1 = -21
(-1 * 5 + x * 5) + -1 = -21
(-5 + 5x) + -1 = -21

Reorder the terms:
-5 + -1 + 5x = -21

Combine like terms: -5 + -1 = -6
-6 + 5x = -21

Solving
-6 + 5x = -21

Solving for variable 'x'.

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

Add '6' to each side of the equation.
-6 + 6 + 5x = -21 + 6

Combine like terms: -6 + 6 = 0
0 + 5x = -21 + 6
5x = -21 + 6

Combine like terms: -21 + 6 = -15
5x = -15

Divide each side by '5'.
x = -3

Simplifying
x = -3