Question

6-3(-1-z)=2z
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Answer 1

$6-3(-1-z)=2z$

$6+3+3z=2z$

$3z-2z=-6-3$

$z=-9$

Answer 2

6-3(-1-z)=2z

6 + 3 + 3z = 2z

9 + 3z = 2z

3z - 2z = - 9

z= - 9