Question

If a-a-a=20
b-b-b=15
c-c-c=25
Then a+b+c= ?

Answer 1

Answer:

Step-by-step explanation:

a-a-a=20

Then a= -20

b-b-b=15

Then b= -15

c-c-c=25

Then c= -25

a+b+c= -20-15-25

=-60

Answer 2

If a-a-a=20  b-b-b=15  c-c-c=25  Then a+b+c is given by,

From given, we have,

a - a - a = 20

0 - a = 20

-a = 20

∴ a = - 20

b - b - b = 15

0 - b = 15

-b = 15

∴ b = - 15

c - c - c = 25

0 - c = 25

-c = 25

∴ c = - 25

Now, consider,

a + b + c = -20 + ( -15 ) + ( -25 )

= -20 - 15 - 25

∴ a + b + c = - 60