3(-5-7z)=

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Solution for 3(-5-7z)= equation: 


Simplifying
3(-5 + -7z) = 0
(-5 * 3 + -7z * 3) = 0
(-15 + -21z) = 0

Solving
-15 + -21z = 0

Solving for variable 'z'.

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

Add '15' to each side of the equation.
-15 + 15 + -21z = 0 + 15

Combine like terms: -15 + 15 = 0
0 + -21z = 0 + 15
-21z = 0 + 15

Combine like terms: 0 + 15 = 15
-21z = 15

Divide each side by '-21'.
z = -0.7142857143

Simplifying
z = -0.7142857143

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