Question

if a +b = 12 and b+a = 20 then find the value of a+b - b - a = ???????????? pls answer this question plspls​

Answer 1

a+b= 12

b+a=20

a+b-b-a= ?

12-20=a

-6=a

-6+b=12

-6+18=12

therefore,

a+b-b-a

18+(-6)-(-6)+18=0

answer= 0

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