Solve the Fraction Equation: Find X in (x+2)/3 = 4/5

Question

Solve for X:

x+23=45 \frac{x+2}{3}=\frac{4}{5}

Video Solution

Solution Steps

00:00 Solve
00:03 We want to isolate the unknown X
00:07 We'll multiply by both denominators to eliminate fractions
00:17 We'll properly open parentheses and multiply by each factor
00:28 We'll arrange the equation so that one side has only the unknown X
00:42 We'll isolate the unknown X
00:46 And this is the solution to the problem

Step-by-Step Solution

To solve the equation x+23=45 \frac{x+2}{3}=\frac{4}{5} , we can follow the method of cross-multiplication:

  • Step 1: Cross-multiply to eliminate the fractions, giving us:

(x+2)5=43(x + 2) \cdot 5 = 4 \cdot 3

  • Step 2: Simplify both sides of the equation:

5(x+2)=125(x + 2) = 12

  • Step 3: Distribute the 5 on the left side:

5x+10=125x + 10 = 12

  • Step 4: Subtract 10 from both sides to isolate the term with x x :

5x=25x = 2

  • Step 5: Divide both sides by 5 to solve for x x :

x=25x = \frac{2}{5}

Therefore, the solution to the equation is 25 \frac{2}{5} .

Answer

25 \frac{2}{5}