12+18a=100

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Solution for 12+18a=100 equation: 



12+18a=100

We move all terms to the left:

12+18a-(100)=0

We add all the numbers together, and all the variables

18a-88=0

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

18a=88

a=88/18

a=4+8/9

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