Question

2 Math Questions about coordinates

Answer 1

Answer:

y = -3

x = -2

Step-by-step explanation:

2x - y = 17

y = x - 10

Adding these 2 equations:-

2x + y - y = 17 + x - 10

2x = x + 7

x = 7  

Now substitute for x  in the first equation:-

2(7)  - y = 17

14 - 17 = y

y = -3   (answer)

Last equation:-

x + 3y = 16

4x - 5y = -38

Now multiply first equation by 5 and the second by 3:-

5x + 15y = 80

12x - 15y = -114   Adding:-

17x = -34

x = -2  (answer)