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1+0.75x=4+0.4x
We move all terms to the left:
1+0.75x-(4+0.4x)=0
We add all the numbers together, and all the variables
0.75x-(0.4x+4)+1=0
We get rid of parentheses
0.75x-0.4x-4+1=0
We add all the numbers together, and all the variables
0.35x-3=0
We move all terms containing x to the left, all other terms to the right
0.35x=3
x=3/0.35
x=8+0.2/0.35
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