Question

The average of 7.5+3.2+20.5+x=10

Answer 1

Answer:

X=8.8✔✔✔✔✔

Step-by-step explanation:

$\huge\underline\mathfrak\pink{Full Explanation:-}$

Average of those:-

$\frac{7.5 + 3.2 + 20.5 + x}{4} = 10 \\ or \: \: \: \: \frac{31.2 + x}{4} = 10 \\ or \: \: \: \: 31.2 + x = 40 \\ or \: \: \: \: x = 40 - 31.2 \\ so \: \: \: \: x = 8.8$

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Answer 2

Answer:

x=8.8

Step-by-step explanation:

(7.5+3.2+20.5+x)/4=10

(31.2+x) /4=10

31.2+x =40

x= 40-31.2

x=8.8