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700(1000)+1200r=1.000.000
We move all terms to the left:
700(1000)+1200r-(1.000.000)=0
We add all the numbers together, and all the variables
1200r+7001000-0=0
We add all the numbers together, and all the variables
1200r+7001000=0
We move all terms containing r to the left, all other terms to the right
1200r=-7001000
r=-7001000/1200
r=-5834+1/6
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