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66.4x+286.8=7170-220.4x
We move all terms to the left:
66.4x+286.8-(7170-220.4x)=0
We add all the numbers together, and all the variables
66.4x-(-220.4x+7170)+286.8=0
We get rid of parentheses
66.4x+220.4x-7170+286.8=0
We add all the numbers together, and all the variables
286.8x-6883.2=0
We move all terms containing x to the left, all other terms to the right
286.8x=6883.2
x=6883.2/286.8
x=24+-9.09494701773E-13/286.8
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