36%÷9/10-0.36×8/9
=36%×10/9-0.36×8/9
=0.36×(10/9-8/9)
=0.36×2/9
=0.08
36×25%+0.25×40
=（36+40）÷4
=76÷4
=19x-15%x=42.5追问不回答新问题，请采纳后再提问，谢谢