Solve for X: Fraction Equation 4/(x+5) = 8/((2-x)×3)

Solve for X:


4x+5=8(2x)×3 \frac{4}{x+5}=\frac{8}{(2-x)\times3}

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find X
00:03 Multiply by common denominator to eliminate fractions
00:21 Carefully open parentheses properly, multiply by each factor
00:46 Arrange the equation so that X is isolated on one side
01:03 Combine like terms
01:10 Isolate X
01:14 Factor 16 into 4 and 4
01:21 Factor 20 into 5 and 4
01:27 Simplify as much as possible
01:32 And this is the solution to the problem

Step-by-step written solution

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1

Understand the problem

Solve for X:


4x+5=8(2x)×3 \frac{4}{x+5}=\frac{8}{(2-x)\times3}

2

Step-by-step solution

To solve the equation 4x+5=8(2x)×3 \frac{4}{x+5} = \frac{8}{(2-x) \times 3} , we will use cross-multiplication.

  • Step 1: Set up the cross-multiplication: 4×(2x)×3=8×(x+5) 4 \times (2-x) \times 3 = 8 \times (x+5)
  • Step 2: Simplify the left side of the equation: 12(2x)=8(x+5) 12(2-x) = 8(x+5)
  • Step 3: Distribute on both sides: 2412x=8x+40 24 - 12x = 8x + 40
  • Step 4: Combine like terms. First, bring all terms involving x x to one side and constant terms to the other side: 2440=8x+12x 24 - 40 = 8x + 12x
  • Step 5: Simplify the equation: 16=20x -16 = 20x
  • Step 6: Solve for x x by dividing both sides by 20: x=1620 x = -\frac{16}{20}
  • Step 7: Simplify the fraction: x=45 x = -\frac{4}{5}

Therefore, the solution to the equation is x=45 x = -\frac{4}{5} .

3

Final Answer

45 -\frac{4}{5}

Practice Quiz

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Solve for X:

\( x - 3 + 5 = 8 - 2 \)

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