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-x/7=-10.4
We move all terms to the left:
-x/7-(-10.4)=0
We add all the numbers together, and all the variables
-x/7+10.4=0
We multiply all the terms by the denominator
-x+(10.4)*7=0
We add all the numbers together, and all the variables
-1x+72.8=0
We move all terms containing x to the left, all other terms to the right
-x=-72.8
x=-72.8/-1
x=72+0.8/1
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