Find the value of x in the following equation:
4(x+2)5=7+5x13
10
12
13
14
⇒4(x+2)5=7+5x13
⇒4(x+2)5=91+5x13
⇒52(x+2)=5(91+5x)
⇒52x+104=455+25x
⇒27x=351 ⇒x=35127
⇒x=13
A set of data arranged in ascending order is given
3, 5, 10, 12, x, 15, 20, 21, 29
Find the value of x if mean of the given numbers is 12.