1.2a+0.5=0.4-0.9a

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Solution for 1.2a+0.5=0.4-0.9a equation: 



1.2a+0.5=0.4-0.9a

We move all terms to the left:

1.2a+0.5-(0.4-0.9a)=0

We add all the numbers together, and all the variables

1.2a-(-0.9a+0.4)+0.5=0

We get rid of parentheses

1.2a+0.9a-0.4+0.5=0

We add all the numbers together, and all the variables

2.1a+0.1=0

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

2.1a=-0.1

a=-0.1/2.1

a=-0.1/2.1

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