-2(z-3)=10

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Solution for -2(z-3)=10 equation: 


Simplifying
-2(z + -3) = 10

Reorder the terms:
-2(-3 + z) = 10
(-3 * -2 + z * -2) = 10
(6 + -2z) = 10

Solving
6 + -2z = 10

Solving for variable 'z'.

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

Add '-6' to each side of the equation.
6 + -6 + -2z = 10 + -6

Combine like terms: 6 + -6 = 0
0 + -2z = 10 + -6
-2z = 10 + -6

Combine like terms: 10 + -6 = 4
-2z = 4

Divide each side by '-2'.
z = -2

Simplifying
z = -2

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