Question

a+b=180 a-b= 24 a=? b=?

Answer 1

a+b=180 => a= 180 - b

a-b= 24

INLOCUIM a= 180-b in a 2-a ecuatie.

a-b= 24

180-b-b=24

180-2b= 24 (trecem 2b in partea dreapta cu semn schimbat si 24 in partea stanga cu semn schimbat)

180-24=2b

156=2b / :2

b= 78

a= 180-b

a= 180-78

a= 102