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16-02-2021
Mathematics

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7. The mean of 7,9,x + 3, 12, 2x - 1 and 3 is 9. Find the value of x.

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ADVENTUROUSBOY ADVENTUROUSBOY

16-02-2021

Answer:

x = 7

Step-by-step explanation:

( 7 + 9 + (x+3) + 12 + ( 2x-3) + 3 ) ÷ 6 = 9

3x + 33 = 54

3x = 54 - 33

3x = 21

x = 7

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