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x*4/12=200
We move all terms to the left:
x*4/12-(200)=0
We multiply all the terms by the denominator
x*4-200*12=0
We add all the numbers together, and all the variables
x*4-2400=0
Wy multiply elements
4x-2400=0
We move all terms containing x to the left, all other terms to the right
4x=2400
x=2400/4
x=600
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