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hi please i need the step bye step solution. thank you ♥ ​

Hi Please I Need The Step Bye Step Solution Thank You class=

Sagot :

Answer:

40

Step-by-step explanation:

3, 6, 9...

120 = 3+(n-1)3

120 = 3+3n-3

120 = 3n

120 / 3 = 3n / 3

40 = n