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Step-by-step explanation:
x/a - y/b= a+b
bx-ay= (a+b)ab
bx= (a+b)ab+ay
x= (a+b)a+ay/b
Put x value in second sentence
(a+b)/a + y/ab+y/b^2= 3
(a+b) + y/b + ay/b^2= 3a
(by + ay)/b^2= 3a-a-b
y(a+b)= (2a-b)(b^2)
y= (2ab^2-b^3)/(a+b)
Substitute y value in x= (a+b)a+ay/b
x= (a+b)+a(2ab-b^2)/(a+b)
x= (a^2+b^2+2ab+2ba^2-ab^2)/(a+b)
x= (a^2(1+2b) + b^2(1-a) + 2ab)/(a+b)
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