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6.4=4.9-0.1x+0.5x
We move all terms to the left:
6.4-(4.9-0.1x+0.5x)=0
We add all the numbers together, and all the variables
-(0.4x+4.9)+6.4=0
We get rid of parentheses
-0.4x-4.9+6.4=0
We add all the numbers together, and all the variables
-0.4x+1.5=0
We move all terms containing x to the left, all other terms to the right
-0.4x=-1.5
x=-1.5/-0.4
x=3+0.3/0.4
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