(0.3x)-2.1/3=0.4

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Solution for (0.3x)-2.1/3=0.4 equation: 



(0.3x)-2.1/3=0.4

We move all terms to the left:

(0.3x)-2.1/3-(0.4)=0

We add all the numbers together, and all the variables

(+0.3x)-2.1/3-(0.4)=0

We add all the numbers together, and all the variables

(+0.3x)-0.4-2.1/3=0

We get rid of parentheses

0.3x-0.4-2.1/3=0

We multiply all the terms by the denominator


(0.3x)*3-2.1-(0.4)*3=0

We add all the numbers together, and all the variables

(+0.3x)*3-2.1-(0.4)*3=0

We add all the numbers together, and all the variables

(+0.3x)*3-3.3=0

We multiply parentheses

0x-3.3=0

We add all the numbers together, and all the variables

x-3.3=0

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

x=3.3

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