2x-15=123

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Solution for 2x-15=123 equation: 



2x-15=123

We move all terms to the left:

2x-15-(123)=0

We add all the numbers together, and all the variables

2x-138=0

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

2x=138

x=138/2

x=69

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