Each answer choice below shows an equation and a value for x. Which of the following are true? Select three that apply. A. If 3(x+6)=15, then x = 3.
B. If 4(x-7) = 36, then x=37.
C. If 5x + 10 =20 then x =2
D. If 6x-12=48, then x=10
E. If 7x-14=-28, then x=8
F. If 8x(x-4)=32, then x=8

Replace x in each equation and see which ones are true.

The answers are:

C. If 5x + 10 =20 then x =2

D. If 6x-12=48, then x=10

F. If 8x(x-4)=32, then x=8

If the square root of x = 7, then x must be equal to:

It is given that:

The square root of x = 7 .

i.e. algebraically this expression is given as follows:

(We know that the term under the radical sign i.e. the square root sign is known as a radicand )

Now, on taking square on both the sides of the equation we have:

        Hence, the value of x which is obtained from the given equation is: