Answer:
n + 9.2 = 12.9
Step-by-step explanation:
whenever u see 'sum' or 'and', think addition. The equation will have a + sign
usually in an equation, the word 'is' means an = sign
So the sum (addition) of a number (n) and (+) 9.2 is (=) 12.9
n + 9.2 = 12.9