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140+630+9.75x=1140
We move all terms to the left:
140+630+9.75x-(1140)=0
We add all the numbers together, and all the variables
9.75x-370=0
We move all terms containing x to the left, all other terms to the right
9.75x=370
x=370/9.75
x=37+1/1.0540540540541
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