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17.9-x=12.
We move all terms to the left:
17.9-x-(12.)=0
We add all the numbers together, and all the variables
-x+17.9-12=0
We add all the numbers together, and all the variables
-1x+5.9=0
We move all terms containing x to the left, all other terms to the right
-x=-5.9
x=-5.9/-1
x=5+0.9/1
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