Question

Which equation is true for the value b = 2?

A.
2b + 24 = 30
B.
3b − 2 = 4
C.
b + 4 = 8
D.
2b − 3 = 0

Answer 1

Equation B is true for the value b = 2

Explanation:

To find which equation is true for the value b=2, you must plug in 2 for b in each equation or you can solve for b.

Equation A

For equation A, I will be solving for b.

`2b + 24 = 30` Subtract 24 from both sides

`2b = 6` Divide both sides by 2

`(2b)/(2) = (6)/(2)`

`b = 3` This is not true for the value b = 2

Equation B

For equation B, I will be plugging in 2 for b.

`3b - 2 = 4` Plug in 2 for b

`3(2) - 2 = 4` Multiply what is in parenthesis

`6 - 2 = 4` Subtract

`4=4` This is true

Equation C

For equation C, I will be plugging in 2 for b.

`b+4=8` Plug in 2 for b

`(2) + 4 = 8` Add

`6\\eq 8` This is not true because 6 does not equal 8

Equation D

For equation D, I will be solving for b.

`2b - 3 = 0`

`2b = 3`

`(2b)/(2) = (3)/(2)`

`b = (2)/(3)` This is not true for the value b = 2

Answer 2

B. 3b − 2 = 4

Explanation:

u just need to substitute the value in the equations