Question

Plz answer fast Q. 20

Answer 1

Answer:

Step-by-step explanation:

1 condition

s-a =90

a=s-90 (eq 1)

2 condition

s-b=50

b=s-50 ( eq2)

3condition

s-c=10

c=s-10 (eq3)

s = (a+b+c)/2

Therefore

(s-90+s-50+s-10)/2 =s

3s-150=2s

s=150