If the system of equation 2x+3y=7 and 29x+(a+b)y=28 has many solutions
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2x+3y=7
2x+3y--7=0.........(1)
a=2 b=3 c=--7
29x+(a+b)y=28
29x+(a+b)y--28=0.........(2)
a'=29 b'=(a+b) c'=--28
a 2 b 3
--=----- , ------=--------
a' 29 b' a+b
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