-3(6-7z)=-81

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Solution for -3(6-7z)=-81 equation: 


Simplifying
-3(6 + -7z) = -81
(6 * -3 + -7z * -3) = -81
(-18 + 21z) = -81

Solving
-18 + 21z = -81

Solving for variable 'z'.

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

Add '18' to each side of the equation.
-18 + 18 + 21z = -81 + 18

Combine like terms: -18 + 18 = 0
0 + 21z = -81 + 18
21z = -81 + 18

Combine like terms: -81 + 18 = -63
21z = -63

Divide each side by '21'.
z = -3

Simplifying
z = -3

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