Rating:
## algebra 50 (misc)
### Solution
We have to solve several equations in this challenge, all equations are one-dimensional about `X`, I simply transform the equation from the form `f = b` to `f - b` and solve it with SymPy.
```python
#!/usr/bin/env python3
from pwn import *
from sympy import Symbol, solve
r = remote("misc.chal.csaw.io", 9002)
r.recvuntil("*\n")
while True:
eq = r.recvline().strip().decode()
if eq.startswith("flag"):
print(eq)
break
X = Symbol("X")
eq = "solve(" + eq.replace("=", "-") + ")"
print(eq)
try:
sol = float(eval(eq)[0])
print("X =", sol)
except IndexError:
r.sendline("0")
else:
r.sendline(str(sol))
r.recvuntil("going\n")
```
### Flag
```
flag{y0u_s0_60od_aT_tH3_qU1cK_M4tH5}
```
