这道方程怎么解，列计算过程

Question

(120000x(P-15)-500000-778400)x(1-25%)/(120000xp)x100%=1%怎么算列计算过程，谢谢！

Answer 1

(120000x(P-15)-500000-778400)x(1-25%)/(120000xp)x100%=1%
(120000x(P-15)-1278400)x(75%)/(120000xp)x1=1%
(120000x(P-15)-1278400)x(3/4)/(120000xp)=1%
(120000x(P-15)-1278400)x1/(160000xp)=1%
(120000x(P-15)-1278400)/(160000xp)=1%
(75(P-15)-799)/(100P)=1%
(75(P-15)-799)/P=1
75(P-15)-799=P
75P-75×15-799=P

75P-P-1924=0

74P=1924
P=26