Answer:
x +10 =0 (1)
-8x -9y=1 (2)
x=-10 => (2) 80-9y=1 =>y=9
=> x=-10, y=9
Step-by-step explanation:
(15+(3-6))x4
1. 3-6 = -3
2. 15+-3 = 12
3. 12x4 = 48
