Answer :

Let's use the distributive property to simplify the expression [tex]\( 7(3x + 4) \)[/tex].

1. Distribute the 7 across both terms inside the parentheses:

The distributive property states that [tex]\( a(b + c) = ab + ac \)[/tex]. In this case, [tex]\( a = 7 \)[/tex], [tex]\( b = 3x \)[/tex], and [tex]\( c = 4 \)[/tex]. Applying the distributive property:

[tex]\[ 7(3x + 4) = 7 \cdot 3x + 7 \cdot 4 \][/tex]

2. Multiply the terms:

[tex]\[ 7 \cdot 3x = 21x \][/tex]

[tex]\[ 7 \cdot 4 = 28 \][/tex]

3. Combine the simplified terms:

[tex]\[ 7(3x + 4) = 21x + 28 \][/tex]

Therefore, the expression simplifies to [tex]\( 21x + 28 \)[/tex].

So, the original equation [tex]\( 7(3x + 4) \)[/tex] simplifies to [tex]\( 21x + 28 \)[/tex], and thus the equation
[tex]\[ 7(3x + 4) = 21x + 28 \][/tex]

The answer is:
[tex]\[ 7(3x + 4) = 21x + 28 \][/tex]