8z-5=4z+21

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Solution for 8z-5=4z+21 equation:


Simplifying
8z + -5 = 4z + 21

Reorder the terms:
-5 + 8z = 4z + 21

Reorder the terms:
-5 + 8z = 21 + 4z

Solving
-5 + 8z = 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.
-5 + 8z + -4z = 21 + 4z + -4z

Combine like terms: 8z + -4z = 4z
-5 + 4z = 21 + 4z + -4z

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

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

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

Combine like terms: 21 + 5 = 26
4z = 26

Divide each side by '4'.
z = 6.5

Simplifying
z = 6.5

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