8=x*0.4-20+9

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Solution for 8=x*0.4-20+9 equation: 



8=x*0.4-20+9

We move all terms to the left:

8-(x*0.4-20+9)=0

We add all the numbers together, and all the variables

-(x*0.4-11)+8=0

We get rid of parentheses

-x*0.4+11+8=0

We add all the numbers together, and all the variables

-x*0.4+19=0

Wy multiply elements

-0.4x+19=0

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

-0.4x=-19

x=-19/-0.4

x=47+0.2/0.4

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