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0.3x-0.8x+5=x-4
We move all terms to the left:
0.3x-0.8x+5-(x-4)=0
We add all the numbers together, and all the variables
-0.5x-(x-4)+5=0
We get rid of parentheses
-0.5x-x+4+5=0
We add all the numbers together, and all the variables
-1.5x+9=0
We move all terms containing x to the left, all other terms to the right
-1.5x=-9
x=-9/-1.5
x=+6
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