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15.50x+150.00+220.00=680.00
We move all terms to the left:
15.50x+150.00+220.00-(680.00)=0
We add all the numbers together, and all the variables
15.50x+150.00+220.00-680=0
We add all the numbers together, and all the variables
15.50x-310=0
We move all terms containing x to the left, all other terms to the right
15.50x=310
x=310/15.50
x=20
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