Answer:
<Q = 30
Step-by-step explanation:
2x + 70 + x - 10 = 180
3x + 60 = 180
3x = 120
x = 40
x - 10
40 - 10
30
<Q = 30 because of vertical angles
20 cookies because y = 8 + 6(x)
X = 2 since half of the cookies left was 6
6(2) = 12 and 12+8 = 20
So in total she baked 20cookies