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-4=6.4+x
We move all terms to the left:
-4-(6.4+x)=0
We add all the numbers together, and all the variables
-(x+6.4)-4=0
We get rid of parentheses
-x-6.4-4=0
We add all the numbers together, and all the variables
-1x-10.4=0
We move all terms containing x to the left, all other terms to the right
-x=10.4
x=10.4/-1
x=-10+0.4/1
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