Question

The value of A for which [5+(-3)]+(-4)=A+[(-3)+(-4)] is true is​

Answer 1

Answer:

5

Step-by-step explanation:

[5+(-3)]+(-4)=A+[(-3)+(-4)]

therefore

[5-3)]+(-4)=A+[(-3)+(-4)]

therefore

[2]+(-4)=A+[(-3)+(-4)]

then

2-4=A+[(-3)+(-4)]

then

-2=A+[(-3)+(-4)]

then

-2=A+[(-3)-4)]

then

-2=A+[-7]

then

-2-[-7]=A

therefore

A=-2+7=5

Answer 2

Answer:

5

Step-by-step explanation:

first from LHS

5-3=2 then 2-4=-2

from rhs

-3-4=-7 then -2-(-7) =-2+7=5

then a =5