Question

Responde a minha esquacao porfavor!!
3 a + b = 2
b-a=0​

Answer 1

Resposta:

3a+b=2

-a+b=0 (•-1) = a-b=0

3a+b=2

+ a-b=0

________

4a+0=2

4a=2

a=2/4

a=1/2

3•1/2+b=2

3/2+b=2

b=2-3/2

b=4/2-3/2

b= 1/2

Resposta: a=1/2 e b=1/2