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0.25x+129=216.50
We move all terms to the left:
0.25x+129-(216.50)=0
We add all the numbers together, and all the variables
0.25x+129-(216.5)=0
We add all the numbers together, and all the variables
0.25x-87.5=0
We move all terms containing x to the left, all other terms to the right
0.25x=87.5
x=87.5/0.25
x=350
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