From 9e7aa51b59035ff210a1f4eb066abbf56fd490da Mon Sep 17 00:00:00 2001
From: s1270179 <s1270179@u-aizu.ac.jp>
Date: Thu, 17 Oct 2019 17:57:12 +0900
Subject: [PATCH] fix type/solve_equation

---
 src/type/solve_equation.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/type/solve_equation.py b/src/type/solve_equation.py
index 3da6a4a..dd2c19d 100644
--- a/src/type/solve_equation.py
+++ b/src/type/solve_equation.py
@@ -1,3 +1,9 @@
 # ax + b = 0
+import math
 def solve_equation(a, b):
-    return b - a
+    gcd = math.gcd(a,b)
+    if ( b % a ) == 0:
+        return -1*a//b
+    a = str(int(a / gcd))
+    b = str(int(b / gcd))
+    return ( "-" + b + "/" + a)