diff --git a/homework_02_numpy_matplotlib/2.4.text b/homework_02_numpy_matplotlib/2.4.text
new file mode 100644
index 0000000000000000000000000000000000000000..0ce7d4a645c09a9e167bf144ae842add5f188664
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+++ b/homework_02_numpy_matplotlib/2.4.text
@@ -0,0 +1,6 @@
+import numpy as np
+a=np.array([[3,4,2],[5,3,4],[8,2,7]])
+b=np.array([10,14,20])
+A=np.linalg.inv(a)
+x=np.dot(b,A)
+print(x)
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