Question

Pls help me need it rn PLS

Answer 1

1) $60 2)$80 3)$78
Exp:
1)30x/100=18. 3x/10=18. 3x=180 x=$60
2)60= 75/100•Y Y=60•100/75 Y=80
3)(60•130)/100= 7800/100= 78