Question

if a + b=-5, b + c=-4 and c=-11.find the value of a + b + c​

Answer 1

Answer:

If a + b=-5, b + c=-4 and c=-11, then the value of a + b + c​ is -16.

Step-by-step explanation:

Given: a + b=-5,

b + c=-4

and c=-11.

Find the value of a + b + c​

If c = -11

then b + c = -4

b + (-11) = -4

b - 11= -4

b = -4 + 11

b = 7

Put b = 7 in a+ b = -5

a + 7 = -5

a = -5-7

a = - 12

So, a + b + c = (-12) + (7) + (-11)

= -12 + 7 - 11

= -23+ 7

= -16

Hence a + b + c = -16

Answer 2

Answer:

Hence value of (a+b+c) = -16

Step-by-step explanation:

In context to questions asked

We have to determine the value of a+b+c

As per questions

We have

$a + b = - 5 - - - - - (1) \\ (b + c) = - 4 - - - - (2) \\ c = - 11 - - - - (3) \\ putting \: value \: of \: c \: in \: eq \: 2 \\ (b + c) = - 4 \\ = > b + ( - 11) = - 4 \\ = > b - 11 = - 4 \\ = > b = - 4 + 11 \\ = > b = 7 - - - - (4) \\ putting \: value \: of \: b \: in \: eq \: 1 \\ (a + b) = - 5 \\ = > a + 7 = - 5 \\ = > a = - 5 - 7 \\ = > a = - 12 \\ a = - 12 \\ b = 7 \\ c = - 11 \\ = > (a + b + c) = - 12 + 7 - 11 = - 23 + 7 = - 16$