-20=-3(7z-4)

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Solution for -20=-3(7z-4) equation:


Simplifying
-20 = -3(7z + -4)

Reorder the terms:
-20 = -3(-4 + 7z)
-20 = (-4 * -3 + 7z * -3)
-20 = (12 + -21z)

Solving
-20 = 12 + -21z

Solving for variable 'z'.

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

Add '21z' to each side of the equation.
-20 + 21z = 12 + -21z + 21z

Combine like terms: -21z + 21z = 0
-20 + 21z = 12 + 0
-20 + 21z = 12

Add '20' to each side of the equation.
-20 + 20 + 21z = 12 + 20

Combine like terms: -20 + 20 = 0
0 + 21z = 12 + 20
21z = 12 + 20

Combine like terms: 12 + 20 = 32
21z = 32

Divide each side by '21'.
z = 1.523809524

Simplifying
z = 1.523809524

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