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x+(663.26-0.25x)=1000
We move all terms to the left:
x+(663.26-0.25x)-(1000)=0
We add all the numbers together, and all the variables
x+(-0.25x+663.26)-1000=0
We get rid of parentheses
x-0.25x+663.26-1000=0
We add all the numbers together, and all the variables
0.75x-336.74=0
We move all terms containing x to the left, all other terms to the right
0.75x=336.74
x=336.74/0.75
x=448+0.74000000000001/0.75
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