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

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


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

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

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

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

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

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

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

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

Solving
-31 + -7z = -2

Solving for variable 'z'.

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

Add '31' to each side of the equation.
-31 + 31 + -7z = -2 + 31

Combine like terms: -31 + 31 = 0
0 + -7z = -2 + 31
-7z = -2 + 31

Combine like terms: -2 + 31 = 29
-7z = 29

Divide each side by '-7'.
z = -4.142857143

Simplifying
z = -4.142857143

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