x*0,4=100-x

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Solution for x*0,4=100-x equation: 



x*0.4=100-x

We move all terms to the left:

x*0.4-(100-x)=0

We add all the numbers together, and all the variables

x*0.4-(-1x+100)=0

Wy multiply elements

0.4x-(-1x+100)=0

We get rid of parentheses

0.4x+1x-100=0

We add all the numbers together, and all the variables

1.4x-100=0

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

1.4x=100

x=100/1.4

x=71+0.6/1.4

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