What is the solution to this equation?

[tex]\[ 3x - 7 + 4x = 28 \][/tex]

A. [tex]\( x = 3 \)[/tex]

B. [tex]\( x = 21 \)[/tex]

C. [tex]\( x = 5 \)[/tex]

D. [tex]\( x = 35 \)[/tex]



Answer :

To solve the equation [tex]\(3x - 7 + 4x = 28\)[/tex], let's follow these steps methodically:

1. Combine like terms on the left-hand side of the equation:
[tex]\[ 3x + 4x - 7 = 28 \][/tex]
Simplifying this, we get:
[tex]\[ 7x - 7 = 28 \][/tex]

2. Isolate the term with [tex]\(x\)[/tex] by adding 7 to both sides of the equation:
[tex]\[ 7x - 7 + 7 = 28 + 7 \][/tex]
This simplifies to:
[tex]\[ 7x = 35 \][/tex]

3. Solve for [tex]\(x\)[/tex] by dividing both sides of the equation by 7:
[tex]\[ x = \frac{35}{7} \][/tex]
Simplify the fraction:
[tex]\[ x = 5 \][/tex]

Therefore, the solution to the equation [tex]\(3x - 7 + 4x = 28\)[/tex] is [tex]\(x = 5\)[/tex].

So, the correct answer is:
C. [tex]\(x = 5\)[/tex]