3x+1.2=6.4-x

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Solution for 3x+1.2=6.4-x equation: 



3x+1.2=6.4-x

We move all terms to the left:

3x+1.2-(6.4-x)=0

We add all the numbers together, and all the variables

3x-(-1x+6.4)+1.2=0

We get rid of parentheses

3x+1x-6.4+1.2=0

We add all the numbers together, and all the variables

4x-5.2=0

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

4x=5.2

x=5.2/4

x=1+1/3.3333333333333

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