0,1a+9+a-11=1,3a+9-0,3a-10

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Solution for 0,1a+9+a-11=1,3a+9-0,3a-10 equation: 



0.1a+9+a-11=1.3a+9-0.3a-10

We move all terms to the left:

0.1a+9+a-11-(1.3a+9-0.3a-10)=0

We add all the numbers together, and all the variables

0.1a+a-(a-1)+9-11=0

We add all the numbers together, and all the variables

1.1a-(a-1)-2=0

We get rid of parentheses

1.1a-a+1-2=0

We add all the numbers together, and all the variables

0.1a-1=0

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

0.1a=1

a=1/0.1

a=10

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