Question

A+B+C=167
A+B-C=67
B+C-A=37
A=?
B=?
C=?
Va rog, dau coroana, plzzzzz!

Answer 1

a + b + c = 167

a + b - c = 67

____________ → scad relatiile

/ ...../    2 c = 100

c = 100 : 2

c = 50

_____________

a + b = 67 + 50

a + b = 117

b + c - a = 37

b + 50 = a + 37 ⇒  b = a + 37 - 50 ⇒  b = a - 13 ⇔  a = b + 13

_____________________________________________

a + b = 117

b + 13 + b = 117

2 x b = 117 - 13

b = 104 : 2  ⇒   b = 52

a = 52 + 13  ⇒ a = 65

__________________

Verific:   a + b + c = 65 + 52 + 50 = 167

b + c - a = 52 + 50 - 65 = 102 - 65 = 37