Question

Срочно нужно решение!

Answer 1

Ответ:

1)x-7y=0

12x+y=17

---

x = 7y

12x+y = 17

---

x = 7y

85y = 17

---

x=7y

y = 0,2

---

x = 1.4

y = 0.2

-------

2) 2x+3y=-1

3x+5y=-2

---

2x = -1-3y

3x+5y= -2

---

x= -1.5y-1

3x+5y=-2

---

x=1.5y-1

-4.5y-3+5y =-2

---

x=1.5y-1

0.5y = 1

---

x=2

y=2

3) хз