9=-3(z+7)

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


Simplifying
9 = -3(z + 7)

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

Solving
9 = -21 + -3z

Solving for variable 'z'.

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

Add '3z' to each side of the equation.
9 + 3z = -21 + -3z + 3z

Combine like terms: -3z + 3z = 0
9 + 3z = -21 + 0
9 + 3z = -21

Add '-9' to each side of the equation.
9 + -9 + 3z = -21 + -9

Combine like terms: 9 + -9 = 0
0 + 3z = -21 + -9
3z = -21 + -9

Combine like terms: -21 + -9 = -30
3z = -30

Divide each side by '3'.
z = -10

Simplifying
z = -10

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