40=200-20z

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Solution for 40=200-20z equation:


Simplifying
40 = 200 + -20z

Solving
40 = 200 + -20z

Solving for variable 'z'.

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

Add '20z' to each side of the equation.
40 + 20z = 200 + -20z + 20z

Combine like terms: -20z + 20z = 0
40 + 20z = 200 + 0
40 + 20z = 200

Add '-40' to each side of the equation.
40 + -40 + 20z = 200 + -40

Combine like terms: 40 + -40 = 0
0 + 20z = 200 + -40
20z = 200 + -40

Combine like terms: 200 + -40 = 160
20z = 160

Divide each side by '20'.
z = 8

Simplifying
z = 8

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