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what is the answer to -22+-8z=-78

 Sep 10, 2015
 #1
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+5

-22+-8z=-78     add 22 to each side

 

-8z  = -56     divide both sides by -8

 

z  = 7

 

 

cool cool cool

 Sep 10, 2015
 #2
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 -22+-8z=-78

 

-78 + 22=8z

-56=8z

z=-56/8

z=-7

 Sep 10, 2015

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