7(3z-8)=-21

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Solution for 7(3z-8)=-21 equation:


Simplifying
7(3z + -8) = -21

Reorder the terms:
7(-8 + 3z) = -21
(-8 * 7 + 3z * 7) = -21
(-56 + 21z) = -21

Solving
-56 + 21z = -21

Solving for variable 'z'.

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

Add '56' to each side of the equation.
-56 + 56 + 21z = -21 + 56

Combine like terms: -56 + 56 = 0
0 + 21z = -21 + 56
21z = -21 + 56

Combine like terms: -21 + 56 = 35
21z = 35

Divide each side by '21'.
z = 1.666666667

Simplifying
z = 1.666666667

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