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How do you solve $z + 81 = 9 z - 7$ $z+81 = 9z - 7$ ?

1 Answer

May 10, 2016

$z = 11$ $color(green)(z=11$

Explanation:

$z + 81 = 9 z - 7$ $z + 81 = 9z - 7$

$81 + 7 = 9 z - z$ $81 + 7 = 9z - z$

$88 = 8 z$ $88 = 8z$

$z = \frac{88}{8}$ $z = 88/8$

$z = 11$ $color(green)(z=11$

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