7(z+3)-4z=12

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Solution for 7(z+3)-4z=12 equation:


Simplifying
7(z + 3) + -4z = 12

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

Combine like terms: 7z + -4z = 3z
21 + 3z = 12

Solving
21 + 3z = 12

Solving for variable 'z'.

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

Add '-21' to each side of the equation.
21 + -21 + 3z = 12 + -21

Combine like terms: 21 + -21 = 0
0 + 3z = 12 + -21
3z = 12 + -21

Combine like terms: 12 + -21 = -9
3z = -9

Divide each side by '3'.
z = -3

Simplifying
z = -3

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