(x+500)*{(y+70)/100+1} =(x+1000)*(y/100+1)

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(x+500)*{(y+70)/100+1}=(x+1000)*(y/100+1)(x+500)*{(y+70)/100+1}=(x+1000)*(y/100+1)(x+500)*{(y+70)/10

(x+500)*{(y+70)/100+1} =(x+1000)*(y/100+1)
(x+500)*{(y+70)/100+1} =(x+1000)*(y/100+1)

(x+500)*{(y+70)/100+1} =(x+1000)*(y/100+1)
7X-50Y=15

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