9(z+1)-4z=-21

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Solution for 9(z+1)-4z=-21 equation:


Simplifying
9(z + 1) + -4z = -21

Reorder the terms:
9(1 + z) + -4z = -21
(1 * 9 + z * 9) + -4z = -21
(9 + 9z) + -4z = -21

Combine like terms: 9z + -4z = 5z
9 + 5z = -21

Solving
9 + 5z = -21

Solving for variable 'z'.

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

Add '-9' to each side of the equation.
9 + -9 + 5z = -21 + -9

Combine like terms: 9 + -9 = 0
0 + 5z = -21 + -9
5z = -21 + -9

Combine like terms: -21 + -9 = -30
5z = -30

Divide each side by '5'.
z = -6

Simplifying
z = -6

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