Question

proove that a-(-b)=a+b if a=-70, b=-20 ? ​

Answer 1

Answer:

a= -70, b= -20

 a-(-b)  =  -70 - (-(-20))

           =  -70 -20

           =   -90  ----------(1)

a+b = -70 + (-20)

      = -70-20

     = -90 -------------(2)

from (1) & (2)

      a - (-b) = a + b

Step-by-step explanation:

Answer 2

Step-by-step explanation:

a=-70,b=-20

-70-(-(-20)

-70-(+20) (+ - = -)

-70-20

-90 (Sing of bigger digit)