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

Answer:

B.  3b − 2 = 4

Step-by-step explanation:

u just need to substitute the value in the equations

Answer 2

Answer:

Equation B is true for the value b = 2

Step-by-step 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

$\frac{2b}{2} = \frac{6}{2}$

$b = 3$ 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

$6\neq 8$ This is not true because 6 does not equal 8

Equation D

For equation D, I will be solving for b.

$2b - 3 = 0$

$2b = 3$

$\frac{2b}{2} = \frac{3}{2}$

$b = \frac{2}{3}$ This is not true for the value b = 2