2.8=6.4-0.9x

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Solution for 2.8=6.4-0.9x equation: 



2.8=6.4-0.9x

We move all terms to the left:

2.8-(6.4-0.9x)=0

We add all the numbers together, and all the variables

-(-0.9x+6.4)+2.8=0

We get rid of parentheses

0.9x-6.4+2.8=0

We add all the numbers together, and all the variables

0.9x-3.6=0

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

0.9x=3.6

x=3.6/0.9

x=4

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