-3(1+7z)=20

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Solution for -3(1+7z)=20 equation: 


Simplifying
-3(1 + 7z) = 20
(1 * -3 + 7z * -3) = 20
(-3 + -21z) = 20

Solving
-3 + -21z = 20

Solving for variable 'z'.

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

Add '3' to each side of the equation.
-3 + 3 + -21z = 20 + 3

Combine like terms: -3 + 3 = 0
0 + -21z = 20 + 3
-21z = 20 + 3

Combine like terms: 20 + 3 = 23
-21z = 23

Divide each side by '-21'.
z = -1.095238095

Simplifying
z = -1.095238095

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