Select the correct answer.

Which equation is equivalent to the given equation?
[tex]\[ 7m + 11 = -4(2m + 3) \][/tex]

A. [tex]\(-m = 1\)[/tex]

B. [tex]\(-15m = -23\)[/tex]

C. [tex]\(-m = -1\)[/tex]

D. [tex]\(15m = -23\)[/tex]



Answer :

To determine which equation is equivalent to the given equation [tex]\( 7m + 11 = -4(2m + 3) \)[/tex], we should solve for [tex]\( m \)[/tex]. Let's go through the steps of solving this equation:

1. Expand and Simplify:
Begin by expanding the right-hand side of the equation:
[tex]\[ 7m + 11 = -4(2m + 3) \][/tex]
[tex]\[ 7m + 11 = -4 \cdot 2m - 4 \cdot 3 \][/tex]
[tex]\[ 7m + 11 = -8m - 12 \][/tex]

2. Isolate the variable [tex]\( m \)[/tex] on one side:
Add [tex]\( 8m \)[/tex] to both sides to combine the terms involving [tex]\( m \)[/tex]:
[tex]\[ 7m + 8m + 11 = -12 \][/tex]
[tex]\[ 15m + 11 = -12 \][/tex]

3. Move the constant term to the other side:
Subtract 11 from both sides to isolate the term with [tex]\( m \)[/tex]:
[tex]\[ 15m = -12 - 11 \][/tex]
[tex]\[ 15m = -23 \][/tex]

4. Solve for [tex]\( m \)[/tex]:
Divide both sides by 15:
[tex]\[ m = \frac{-23}{15} \][/tex]

Now, we have the value of [tex]\( m \)[/tex]. To find the equivalent equation, we can compare the provided options with our steps.

1. Option A: [tex]\( -m = 1 \)[/tex]
[tex]\[ m = -1 \][/tex]
This is not equivalent since [tex]\( m \neq -1 \)[/tex].

2. Option B: [tex]\( -15m = -23 \)[/tex]
[tex]\[ -15 \cdot \frac{-23}{15} = -23 \][/tex]
Simplifies to [tex]\( 15m = -23 \)[/tex], which contains the same coefficient structure as our derived equation.

3. Option C: [tex]\( -m = -1 \)[/tex]
[tex]\[ m = 1 \][/tex]
This is not equivalent since [tex]\( m \neq 1 \)[/tex].

4. Option D: [tex]\( 15m = -23 \)[/tex]
[tex]\[ This is exactly the equation we derived. \][/tex]

Based on our solution, the correct answer is:
[tex]\[ \boxed{15m = -23} \][/tex]

Therefore, the equation:
[tex]\[ 15m = -23 \][/tex]
is equivalent to the given equation. Hence, the correct answer is:
[tex]\[ \boxed{D} \][/tex]