Question Details

The solution of the equation (x+1)(2x+4)35x=123 is also the solution of the equation :

Options

A

5 (2x + 1) = 3 (x + 1)

B

3 (2x + 3) = 2 (x + 3)

C

3 (2x + 3) = 5 (x + 1)

D

2 (2x − 3) = 3 (x + 1)

Show Answer

Correct Answer :

Option C

3 (2x + 3) = 5 (x + 1)

Solution :

` as specified by the prompt constraints: - Use MathML / standard HTML formatting rules (no LaTeX `$..$`, standard raw Unicode, no display="block", etc.) - Wrap text in `

` and `` / ``. Let's output the result. 3 (2x + 3) = 5 (x + 1)

The correct option is 3 (2x + 3) = 5 (x + 1).

Step 1: Solve the given equation for x.

The given equation is:

(x+1)(2x+4)35x=123

Simplifying the numerator on the left-hand side:

(x+1)(2x+4)=x+12x4=x3

Substitute this back into the equation:

x335x=123

Cross-multiplying gives:

23(x3)=1(35x)

23x69=35x

Rearranging terms to isolate x:

23x+5x=3+69

18x=72

x=7218=4

Step 2: Verify which given option has x=4 as a solution.

Substitute x=4 into the equation 3 (2x + 3) = 5 (x + 1):

LHS = 3(2(4)+3)=3(8+3)=3(5)=15

RHS = 5((4)+1)=5(3)=15

Since LHS = RHS, x=4 is indeed the solution of 3 (2x + 3) = 5 (x + 1).

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