Question

The average of 35,45 and x is equal to five more than twice of x. Find the x​

Answer 1

Answer:

13

Step-by-step explanation:

average of three numbers a, b, and c is (a+b+c)/3

five more than twice of x = 2x + 5

ACCORDING TO THE QUESTION,

(35+45+x)/3 = 2x + 5

=> 80 + x = 6x + 15

=> 5x = 65

=> x = 13

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Answer 2

Answer:

x=13

Step-by-step explanation:

The average of 35, 45 and x is given by

⇒(35+45+x)/3

The average is equal to five more than twice x

Hence,

(35+45+x)/3=2x+5

The above equation can be written as

(35+45+x)/3=(2x+5)/1

Cross product and solve

1(35+45+x)=3(2x+5)

35+45+x=6x+15

80+x=6x+5

80-15=6x-x

65=5x

x=65/5

x=13