2z+9=90

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Solution for 2z+9=90 equation: 



2z+9=90

We move all terms to the left:

2z+9-(90)=0

We add all the numbers together, and all the variables

2z-81=0

We move all terms containing z to the left, all other terms to the right

2z=81

z=81/2

z=40+1/2

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