9+2c=90

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Solution for 9+2c=90 equation: 



9+2c=90

We move all terms to the left:

9+2c-(90)=0

We add all the numbers together, and all the variables

2c-81=0

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

2c=81

c=81/2

c=40+1/2

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