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Solve the equation:
[tex]\[ \frac{6}{x+5} = \frac{3}{x-10} \][/tex]

What are the solutions?
A. [tex]\(x = -20\)[/tex]
B. [tex]\(x = 25\)[/tex] only
C. [tex]\(x = 5\)[/tex]
D. [tex]\(x = -5, 10\)[/tex]


Sagot :

To solve the equation

[tex]\[ \frac{6}{x+5} = \frac{3}{x-10}, \][/tex]

we’ll follow a systematic approach:

1. Cross-Multiply:
By cross-multiplying the given equation, we eliminate the fractions. Doing so, we get

[tex]\[ 6(x - 10) = 3(x + 5). \][/tex]

2. Expand Both Sides:
Next, distribute the constants on each side:

[tex]\[ 6x - 60 = 3x + 15. \][/tex]

3. Isolate the Variable:
To isolate [tex]\(x\)[/tex], we need to combine like terms. First, subtract [tex]\(3x\)[/tex] from both sides:

[tex]\[ 6x - 3x - 60 = 15, \][/tex]

which simplifies to:

[tex]\[ 3x - 60 = 15. \][/tex]

Next, add 60 to both sides:

[tex]\[ 3x = 75. \][/tex]

4. Solve for [tex]\(x\)[/tex]:
Finally, divide both sides by 3:

[tex]\[ x = 25. \][/tex]

So, the solution to the equation

[tex]\[ \frac{6}{x+5} = \frac{3}{x-10} \][/tex]

is:

[tex]\[ x = 25. \][/tex]

After verifying the potential solutions, only [tex]\(x = 25\)[/tex] satisfies the given equation. Therefore, the correct solution is [tex]\(x = 25\)[/tex] only.