3x-2.5=7.8+x

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Solution for 3x-2.5=7.8+x equation: 



3x-2.5=7.8+x

We move all terms to the left:

3x-2.5-(7.8+x)=0

We add all the numbers together, and all the variables

3x-(x+7.8)-2.5=0

We get rid of parentheses

3x-x-7.8-2.5=0

We add all the numbers together, and all the variables

2x-10.3=0

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

2x=10.3

x=10.3/2

x=5+0.3/2

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