(3z-2)2-8(3z-2)=20

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Solution for (3z-2)2-8(3z-2)=20 equation:


Simplifying
(3z + -2) * 2 + -8(3z + -2) = 20

Reorder the terms:
(-2 + 3z) * 2 + -8(3z + -2) = 20

Reorder the terms for easier multiplication:
2(-2 + 3z) + -8(3z + -2) = 20
(-2 * 2 + 3z * 2) + -8(3z + -2) = 20
(-4 + 6z) + -8(3z + -2) = 20

Reorder the terms:
-4 + 6z + -8(-2 + 3z) = 20
-4 + 6z + (-2 * -8 + 3z * -8) = 20
-4 + 6z + (16 + -24z) = 20

Reorder the terms:
-4 + 16 + 6z + -24z = 20

Combine like terms: -4 + 16 = 12
12 + 6z + -24z = 20

Combine like terms: 6z + -24z = -18z
12 + -18z = 20

Solving
12 + -18z = 20

Solving for variable 'z'.

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

Add '-12' to each side of the equation.
12 + -12 + -18z = 20 + -12

Combine like terms: 12 + -12 = 0
0 + -18z = 20 + -12
-18z = 20 + -12

Combine like terms: 20 + -12 = 8
-18z = 8

Divide each side by '-18'.
z = -0.4444444444

Simplifying
z = -0.4444444444

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