7(z+3)-5z=9

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Solution for 7(z+3)-5z=9 equation:


Simplifying
7(z + 3) + -5z = 9

Reorder the terms:
7(3 + z) + -5z = 9
(3 * 7 + z * 7) + -5z = 9
(21 + 7z) + -5z = 9

Combine like terms: 7z + -5z = 2z
21 + 2z = 9

Solving
21 + 2z = 9

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 + 2z = 9 + -21

Combine like terms: 21 + -21 = 0
0 + 2z = 9 + -21
2z = 9 + -21

Combine like terms: 9 + -21 = -12
2z = -12

Divide each side by '2'.
z = -6

Simplifying
z = -6

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