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-2.5=0.4x+1.3
We move all terms to the left:
-2.5-(0.4x+1.3)=0
We get rid of parentheses
-0.4x-1.3-2.5=0
We add all the numbers together, and all the variables
-0.4x-3.8=0
We move all terms containing x to the left, all other terms to the right
-0.4x=3.8
x=3.8/-0.4
x=-9+0.2/0.4
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