84=-7z

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Solution for 84=-7z equation:


Simplifying
84 = -7z

Solving
84 = -7z

Solving for variable 'z'.

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

Add '7z' to each side of the equation.
84 + 7z = -7z + 7z

Combine like terms: -7z + 7z = 0
84 + 7z = 0

Add '-84' to each side of the equation.
84 + -84 + 7z = 0 + -84

Combine like terms: 84 + -84 = 0
0 + 7z = 0 + -84
7z = 0 + -84

Combine like terms: 0 + -84 = -84
7z = -84

Divide each side by '7'.
z = -12

Simplifying
z = -12

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