4(z+1)-1=21

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Solution for 4(z+1)-1=21 equation:


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

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

Reorder the terms:
4 + -1 + 4z = 21

Combine like terms: 4 + -1 = 3
3 + 4z = 21

Solving
3 + 4z = 21

Solving for variable 'z'.

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

Add '-3' to each side of the equation.
3 + -3 + 4z = 21 + -3

Combine like terms: 3 + -3 = 0
0 + 4z = 21 + -3
4z = 21 + -3

Combine like terms: 21 + -3 = 18
4z = 18

Divide each side by '4'.
z = 4.5

Simplifying
z = 4.5

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