1=4z+21

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Solution for 1=4z+21 equation:


Simplifying
1 = 4z + 21

Reorder the terms:
1 = 21 + 4z

Solving
1 = 21 + 4z

Solving for variable 'z'.

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

Add '-4z' to each side of the equation.
1 + -4z = 21 + 4z + -4z

Combine like terms: 4z + -4z = 0
1 + -4z = 21 + 0
1 + -4z = 21

Add '-1' to each side of the equation.
1 + -1 + -4z = 21 + -1

Combine like terms: 1 + -1 = 0
0 + -4z = 21 + -1
-4z = 21 + -1

Combine like terms: 21 + -1 = 20
-4z = 20

Divide each side by '-4'.
z = -5

Simplifying
z = -5

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