Question

a+b=3,a+b+c=4,b+c=12 , so what will be a+c ?

Answer 1

Given
a+b=3 - - - - (1)

a+b+c=4 - - - - - - (2)

b+c=12 - - - - - - - (3)


Putting the value of a+b in equation 3 from equ 1

3+c=4

C=4-3

C=1

Now putting the Value of c in equation 3 we get

B+1=12

B=12-1

B=11

Now putting the value of b+c from equ 3 in equation 2

A+12=4

A=4-12

A=-8

So now we have the values of all variables

A=-8, B=11, C=1

A+C=-8+1

A+C=-7


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