3z*7-2=-4

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Solution for 3z*7-2=-4 equation:


Simplifying
3z * 7 + -2 = -4

Reorder the terms for easier multiplication:
3 * 7z + -2 = -4

Multiply 3 * 7
21z + -2 = -4

Reorder the terms:
-2 + 21z = -4

Solving
-2 + 21z = -4

Solving for variable 'z'.

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

Add '2' to each side of the equation.
-2 + 2 + 21z = -4 + 2

Combine like terms: -2 + 2 = 0
0 + 21z = -4 + 2
21z = -4 + 2

Combine like terms: -4 + 2 = -2
21z = -2

Divide each side by '21'.
z = -0.09523809524

Simplifying
z = -0.09523809524

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