Question

solve using substitution method x/2a -y/2b =a+b ; x/a + y/b=a-b

Answer 1

x/2a-y/2b=a+b
x/a+y/b=a-b
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let x/a be c and y/b be d
now,
2c-2d=a+b
c + d =a+b
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2c-2d=a+b
2c+2d=a+b
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4c = 2(a+b)
2c= a+b