3.5=7.1-0.9x

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Solution for 3.5=7.1-0.9x equation: 



3.5=7.1-0.9x

We move all terms to the left:

3.5-(7.1-0.9x)=0

We add all the numbers together, and all the variables

-(-0.9x+7.1)+3.5=0

We get rid of parentheses

0.9x-7.1+3.5=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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