Answer:
x = 3
Step-by-step explanation:
To do a system of equations set the two equations equal to each other
x² - 4x + 3 = x² - 9x + 18
-x² -x²
-4x + 3 = -9x + 18
+4x +4x
3 = -5x + 18
-18 -18
-15 = -5x
3 = x
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