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50-1.99x=30
We move all terms to the left:
50-1.99x-(30)=0
We add all the numbers together, and all the variables
-1.99x+20=0
We move all terms containing x to the left, all other terms to the right
-1.99x=-20
x=-20/-1.99
x=10+0.1/1.99
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