2(5-2z)=20

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Solution for 2(5-2z)=20 equation: 


Simplifying
2(5 + -2z) = 20
(5 * 2 + -2z * 2) = 20
(10 + -4z) = 20

Solving
10 + -4z = 20

Solving for variable 'z'.

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

Add '-10' to each side of the equation.
10 + -10 + -4z = 20 + -10

Combine like terms: 10 + -10 = 0
0 + -4z = 20 + -10
-4z = 20 + -10

Combine like terms: 20 + -10 = 10
-4z = 10

Divide each side by '-4'.
z = -2.5

Simplifying
z = -2.5

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