2x=100-40

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Solution for 2x=100-40 equation: 



2x=100-40

We move all terms to the left:

2x-(100-40)=0

We add all the numbers together, and all the variables

2x-60=0

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

2x=60

x=60/2

x=30

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