-4=2-z-z

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Solution for -4=2-z-z equation:


Simplifying
-4 = 2 + -1z + -1z

Combine like terms: -1z + -1z = -2z
-4 = 2 + -2z

Solving
-4 = 2 + -2z

Solving for variable 'z'.

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

Add '2z' to each side of the equation.
-4 + 2z = 2 + -2z + 2z

Combine like terms: -2z + 2z = 0
-4 + 2z = 2 + 0
-4 + 2z = 2

Add '4' to each side of the equation.
-4 + 4 + 2z = 2 + 4

Combine like terms: -4 + 4 = 0
0 + 2z = 2 + 4
2z = 2 + 4

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

Divide each side by '2'.
z = 3

Simplifying
z = 3

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