If a+b=5 and 3a+2b=20, Then value of a+b is:1) 102) 153) 204) 25

1.	If a+b=5 and 3a+2b=20, Then value of a+b is:1) 102) 153) 204) 25
Answer» Ooo.But this ques. had come in chs exam Question Must be :\xa0If a + b = 5 and 3a + 2b = 20, then 3a + b will beAns.\xa04) 25a + b = 5 .............(1)3a + 2b = 20 .........(2)From (1), a = 5 - b\xa0put this value in (2), we get\xa0=> 3( 5 - b ) + 2b = 20=> 15 - 3b + 2b = 20\xa0=> - b = 5\xa0=> b = -5\xa0put values of b in (1), we get=> a - 5 = 5\xa0=> a = 10\xa0Now, 3a + b = 3(10 ) - 5= 30 - 5 = 25

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