0.4x+1.5=0.8x-2.1

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Solution for 0.4x+1.5=0.8x-2.1 equation: 



0.4x+1.5=0.8x-2.1

We move all terms to the left:

0.4x+1.5-(0.8x-2.1)=0

We get rid of parentheses

0.4x-0.8x+2.1+1.5=0

We add all the numbers together, and all the variables

-0.4x+3.6=0

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

-0.4x=-3.6

x=-3.6/-0.4

x=+9

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