Answer:
15/2
Step-by-step explanation:
2x+3=18
2x=18-3
2x=15
x=15/2
dont trust me but
I think it tis d or b but mostly d
9 children tickets
Check:
adult is 5$
child3$
6×5=30
9×3=27
30+27=57
Step by step in photo
-7xy+4x^2-8 and y+1-8x^y