i honestly dont know

Question

If the expression 4x-3 is equal to 11 for some value of x, then what is the expression 4x-1 equal to for the same value of x?

A) -15

B) 13

C) 9

D) -11

Answer 1

4x-3=11

4x=14

x=14/4

x=7/2

 

4x-1 for x=7/2

4(7/2)-1

(28/2)-1

14-1

13 which is B)

 

another way to look at this problem...

4x-3 is equal to 11 for some x

4x-1 is 2 more than 4x-3

2 more than 11 is 13

Answer 2

The first thing you have to do is solve for x.

 

The first equation says 4x - 3 = 11

 

Add 3 to both sides

4x = 14

 

Divide both sides by 4

x = 14/4

 

Now that we have the value of x, plug that value into the second equation:

4(14/4) - 1

14 - 1 = 13

 

Therefore the answer is B, 13.