3+x=7-3x

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Solution for 3+x=7-3x equation: 



3+x=7-3x

We move all terms to the left:

3+x-(7-3x)=0

We add all the numbers together, and all the variables

x-(-3x+7)+3=0

We get rid of parentheses

x+3x-7+3=0

We add all the numbers together, and all the variables

4x-4=0

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

4x=4

x=4/4

x=1

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