Question

if a+b=15 and b+c=12 then a+c =?​

Answer 1

Answer:

19.5

Step-by-step explanation:

a=7.5 so c=6 as 6+6=12 ans=19.5

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Answer 2

Step-by-step explanation:

$a + b = 15 - - - - - - 1st \: equation\\ b + c = 12 - - - - - - -2nd \: equation \\ by \: subtracting \: 1st \: equation \: by \: 2nd \: we \: get \\ a - c = 3$-----3rd \:equation\\now \: by\: adding\: 2nd \: and \: 3rd \: equation\\ \: we \: have\:a+c=15.

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