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8.89-2.8x=4.5x+0.4
We move all terms to the left:
8.89-2.8x-(4.5x+0.4)=0
We get rid of parentheses
-2.8x-4.5x-0.4+8.89=0
We add all the numbers together, and all the variables
-7.3x+8.49=0
We move all terms containing x to the left, all other terms to the right
-7.3x=-8.49
x=-8.49/-7.3
x=1+1/6.1344537815126
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