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-99 = 12z - 3(6)z

Simplifying the expression, we have:

-99 = 12z - 18z = -6z

Divide by -6:

z = 16.5

Or, if you meant 3 6 as the number, we have:

-99 = 12z - 36z

Simplify:

-99 = -24z

Divide by -24:

z = 4.125

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15y ago

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