Question

{3x+y=17 2x-y=3} qual e a resposta.Grata

Answer 1

3x + 2x = 17 + 3
5x = 20
x = 20 / 5
x = 4

12 + y = 17
y = 17 - 12
y = 5

Answer 2

Boa tarde

3x + y = 17
2x - y = 3

adição

5x = 20
x = 20/5 = 4

3x + y = 17
3*4 + y = 17 
y = 17 - 12 = 5

S = (4, 5)