diff --git a/t3.m b/t3.m
new file mode 100644
index 0000000..b20cc85
--- /dev/null
+++ b/t3.m
@@ -0,0 +1,11 @@
+clear,clc
+B=[7 5.84 4.9016 4.1381;
+    5.84 4.9016 4.1381 3.5131;
+    4.9016 4.1381 3.5131 2.9986;
+    4.1381 3.5131 2.9986 2.6420]
+C=[20.05;
+   16.642;
+   13.8968;
+   11.6731]
+
+A=inv(B)*C
\ No newline at end of file