20x=400-100

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Solution for 20x=400-100 equation: 



20x=400-100

We move all terms to the left:

20x-(400-100)=0

We add all the numbers together, and all the variables

20x-300=0

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

20x=300

x=300/20

x=15

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