Question

3x + y = 13

__2x - y = 12________ (R:5,-2)​

Answer 1

Resposta:

26 de out. de 2017 · 2 respostas

3x + y = 13 2x - y = 12 ---------- ------ 5x = 25 x = 25/5 x = 5 3x + y = 13 3.5 + y = 13 15 + y = 13 y = 13 - 15 y = -2. 

26 de out. de 2017 · 2 respostas

3x + y = 13 2x - y = 12 ---------- ------ 5x = 25 x = 25/5 x = 5 3x + y = 13 3.5 + y = 13 15 + y = 13 y = 13 - 15 y = -2.