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200-4x=100-0.5x
We move all terms to the left:
200-4x-(100-0.5x)=0
We add all the numbers together, and all the variables
-4x-(-0.5x+100)+200=0
We get rid of parentheses
-4x+0.5x-100+200=0
We add all the numbers together, and all the variables
-3.5x+100=0
We move all terms containing x to the left, all other terms to the right
-3.5x=-100
x=-100/-3.5
x=28+2/3.5
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