123=143-0.65a

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Solution for 123=143-0.65a equation: 



123=143-0.65a

We move all terms to the left:

123-(143-0.65a)=0

We add all the numbers together, and all the variables

-(-0.65a+143)+123=0

We get rid of parentheses

0.65a-143+123=0

We add all the numbers together, and all the variables

0.65a-20=0

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

0.65a=20

a=20/0.65

a=30+0.5/0.65

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