Answer:
-10 times the first equation and 3 times the second equation
Step-by-step explanation:
Multiply the first equation by 10 and the second equation by -3:
1. 1/5 x + 3/4 y = 9
x-10 ⇒ -2x - 15/2 y = -90
2. 2/3 x - 5/6 y = 8
x3 ⇒ 2x - 5/2 y = 24
Add the equations together:
-2x - 15/2 y = -90
+ 2x - 5/2 y = 24
-------------------------
0x - 10y = -66
