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1.89-0.4x=0.39-0.15x
We move all terms to the left:
1.89-0.4x-(0.39-0.15x)=0
We add all the numbers together, and all the variables
-0.4x-(-0.15x+0.39)+1.89=0
We get rid of parentheses
-0.4x+0.15x-0.39+1.89=0
We add all the numbers together, and all the variables
-0.25x+1.5=0
We move all terms containing x to the left, all other terms to the right
-0.25x=-1.5
x=-1.5/-0.25
x=+6
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