7z+z=7z-4-9z

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Solution for 7z+z=7z-4-9z equation: 


Simplifying
7z + z = 7z + -4 + -9z

Combine like terms: 7z + z = 8z
8z = 7z + -4 + -9z

Reorder the terms:
8z = -4 + 7z + -9z

Combine like terms: 7z + -9z = -2z
8z = -4 + -2z

Solving
8z = -4 + -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.
8z + 2z = -4 + -2z + 2z

Combine like terms: 8z + 2z = 10z
10z = -4 + -2z + 2z

Combine like terms: -2z + 2z = 0
10z = -4 + 0
10z = -4

Divide each side by '10'.
z = -0.4

Simplifying
z = -0.4

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