Question

the sum of two rational numbers is -4 /5 if one of the number is -7/20​

Answer 1

x +(-7/20)=-4/5
x= -4/5 - (-7/20)
=-16/20+7/20=+9/20

Answer 2

Answer: - 9/20.

Step-by-step explanation:

Let the number needed to be found be x,

Then x+ (-7/20) = -4/5

x = - 4/5 + 7/20

or x = 7/20 - 4/5

x = (7-16)/20

or x = - 9/20.