What is the exact value of x
4*6^3x=221

A.

Step-by-step explanation:

We are given that

We have to find the exact  value of x.

To find the exact value of x we will take log on both sides.

Using division property of equality

Taking log on both sides of equality

Then, we get

Using property :

Using division property of equality

Hence, option A is true.

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -