2.1(a+2)=-2.1a+4.2

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Solution for 2.1(a+2)=-2.1a+4.2 equation: 



2.1(a+2)=-2.1a+4.2

We move all terms to the left:

2.1(a+2)-(-2.1a+4.2)=0

We multiply parentheses

2.1a-(-2.1a+4.2)+4.2=0

We get rid of parentheses

2.1a+2.1a-4.2+4.2=0

We add all the numbers together, and all the variables

4.2a=0

a=0/4.2

a=0

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