Solve for one variable

this is the code for which i want tk solve for p :

syms p
A=0.1199;
At=0.112;
y=1.43;
P1=119;
Error =0.01123;
eqn= ((At^2)/(A^2))==(((y+1)/2)^((y+1)/(y-1)))*(2/(y-1))*(((p/P1)^(2/y))-((p/P1)^(y+1/y)))
solve( eqn,p )

there is only one issue when i run it and that is the eqn shown in command window is completely different from what declared. For example in command type

eqn

The lhs is very different from what i declared for At and A.

Answer 1

[Star Strider]

It really is not at all different, except the format.

Examing it —

syms p
A=0.1199;
At=0.112;
y=1.43;
P1=119;
Error =0.01123;
eqn= ((At^2)/(A^2))==(((y+1)/2)^((y+1)/(y-1)))*(2/(y-1))*(((p/P1)^(2/y))-((p/P1)^(y+1/y)))

eqn = 

solve( eqn,p )

Warning: Unable to solve symbolically. Returning a numeric solution using vpasolve.

ans = 

20.676508138624863263582165888508

Different format, however same value —

LHS_eqn = lhs(eqn)

LHS_eqn = 

LHS_eqn_dec = vpa(LHS_eqn)

LHS_eqn_dec = 

0.87256477979634128328001452246099

At_squared = At^2

At_squared = 0.0125

A_squared = A^2

A_squared = 0.0144

LHS_frac = At_squared / A_squared

LHS_frac = 0.8726

LHS_dec = vpa(LHS_frac)

LHS_dec = 

0.87256477979634128328001452246099

.