Find the value of x .

12.5,-10,-7.5,x ; The mean is 11.5

51

Step-by-step explanation:

The mean is obtained by adding up the values in the data set and then divide by the number of values that you added:

Given our mean as 11.5 and n=4:

#Knowing our sum as 65, we can obtain x by subtracting sum of known values from 65:

Hence, the value of x is 51

step-by-step explanation:

i dont get

fa tha first one you gonna add y to both sides

it look like this

x-y+y=6+y

x=y+6

therefore your answer is

x =y+6

fa tha second one

you gonna flip tha equation

it gonna look like x-4y=y

then add 4 to both sides

it gonna look like tha

x-4 +4 =y +4

so therefore tha answer is x=y+4

step-by-step explanation: