Question

11y+15x=-23 7y-2x=20 by simultaneous method​

Answer 1

Answer:

multiply first by 2, and second by 15

22y + 30x = -46

105y - 30x = 300

127y = 254

y = 254/ 127 = 2

putting in first,

11(2) + 15x = -23

15x = -23 - 22

x = -45/15

x = -3