x+4=7+5

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Solution for x+4=7+5 equation: 



x+4=7+5

We move all terms to the left:

x+4-(7+5)=0

We add all the numbers together, and all the variables

x+4-12=0

We add all the numbers together, and all the variables

x-8=0

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

x=8

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