3x-4=4+5

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Solution for 3x-4=4+5 equation: 



3x-4=4+5

We move all terms to the left:

3x-4-(4+5)=0

We add all the numbers together, and all the variables

3x-4-9=0

We add all the numbers together, and all the variables

3x-13=0

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

3x=13

x=13/3

x=4+1/3

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