Q. Solve for all values of x.x+4x−8=x−2Answer: x=
Identify Equation: First, we need to identify the equation we are solving: (x−8)/(x+4)=(−2)/(x). We will solve for x by finding a common denominator and then cross-multiplying to eliminate the fractions.
Find Common Denominator: The common denominator between (x+4) and x is x(x+4). We will cross-multiply to get rid of the fractions: (x−8)×x=(−2)×(x+4).
Cross-Multiply: Now we distribute on both sides of the equation: x(x)−8x=−2x−8.
Distribute and Simplify: Simplify the equation by combining like terms: x2−8x=−2x−8.
Bring Terms Together: To solve for x, we need to bring all terms to one side of the equation to set it equal to zero: x2−8x+2x+8=0.
Combine Like Terms: Combine like terms: x2−6x+8=0.
Factor Quadratic Equation: Now we factor the quadratic equation: x - \(4)(x - 2) = 0\
Set Factors Equal: Set each factor equal to zero and solve for x: x−4=0 or x−2=0.
Solve for x: Solving the first equation for x gives us x=4. Solving the second equation for x gives us x=2.
Check Valid Solutions: However, we must check these solutions against the original equation to ensure they do not make any denominator zero. The original equation has denominators (x+4) and x, so x cannot be −4 or 0.
Check x=4: Checking x=4: Since 4 is not −4 or 0, it does not make any denominator zero, so x=4 is a valid solution.
Check x=2: Checking x=2: Since 2 is not −4 or 0, it does not make any denominator zero, so x=2 is a valid solution.
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