Question

d. a+ 3b = 5
2a -3b = -8

Answer 1

Resposta:

{a + 3b= 5

{2a - 3b = - 8

_________

3a +0 = - 3

a = - 3/3

a= - 1

a+ 3b = 5

-1 +3b = 5

3b= 5+1

b= 6/3

b= 2

S{- 1, 2}