Respuesta :

itsmeagain8427

a/5 - b/2 = 10...(1)

2a-5b/10 = 10

2a-5b=10×10

2a-5b=100...(2)

a-b=29...(3)

2a-2b=58...(4)

subtract (4) from (2)

2a-5b=100

2a-4b=58

-b = 42

b = -42

2a-2b=58

2a-2(-42)=58

2a+84=58

2a=-26

a= -13

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