(2z-7)-3(3z+8)=z-9

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Solution for (2z-7)-3(3z+8)=z-9 equation:


Simplifying
(2z + -7) + -3(3z + 8) = z + -9

Reorder the terms:
(-7 + 2z) + -3(3z + 8) = z + -9

Remove parenthesis around (-7 + 2z)
-7 + 2z + -3(3z + 8) = z + -9

Reorder the terms:
-7 + 2z + -3(8 + 3z) = z + -9
-7 + 2z + (8 * -3 + 3z * -3) = z + -9
-7 + 2z + (-24 + -9z) = z + -9

Reorder the terms:
-7 + -24 + 2z + -9z = z + -9

Combine like terms: -7 + -24 = -31
-31 + 2z + -9z = z + -9

Combine like terms: 2z + -9z = -7z
-31 + -7z = z + -9

Reorder the terms:
-31 + -7z = -9 + z

Solving
-31 + -7z = -9 + z

Solving for variable 'z'.

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

Add '-1z' to each side of the equation.
-31 + -7z + -1z = -9 + z + -1z

Combine like terms: -7z + -1z = -8z
-31 + -8z = -9 + z + -1z

Combine like terms: z + -1z = 0
-31 + -8z = -9 + 0
-31 + -8z = -9

Add '31' to each side of the equation.
-31 + 31 + -8z = -9 + 31

Combine like terms: -31 + 31 = 0
0 + -8z = -9 + 31
-8z = -9 + 31

Combine like terms: -9 + 31 = 22
-8z = 22

Divide each side by '-8'.
z = -2.75

Simplifying
z = -2.75

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