Solved on Feb 29, 2024

Find the least common denominator (LCD) to solve the linear equation 15x+12x=13\frac{1}{5}x + \frac{1}{2}x = \frac{1}{3}.

STEP 1

Assumptions
1. The given equation is 15x+12x=13\frac{1}{5} x + \frac{1}{2} x = \frac{1}{3}.
2. We need to find the least common denominator (LCD) of the fractional coefficients to eliminate the fractions.

STEP 2

Identify the denominators of the fractional coefficients in the equation.
The denominators are 5, 2, and 3 for the fractions 15\frac{1}{5}, 12\frac{1}{2}, and 13\frac{1}{3} respectively.

STEP 3

Find the least common multiple (LCM) of the denominators, which will be the least common denominator (LCD) for the equation.
The denominators are 5, 2, and 3.

STEP 4

List the prime factors of each denominator.
- Prime factors of 5: 5 - Prime factors of 2: 2 - Prime factors of 3: 3

STEP 5

For each prime factor, take the highest power that appears in any of the denominators.
- For the prime factor 5: The highest power is 515^1. - For the prime factor 2: The highest power is 212^1. - For the prime factor 3: The highest power is 313^1.

STEP 6

Multiply these highest powers together to find the LCD.
LCD=51×21×31LCD = 5^1 \times 2^1 \times 3^1

STEP 7

Calculate the LCD.
LCD=5×2×3LCD = 5 \times 2 \times 3

STEP 8

Multiply the numbers to find the LCD.
LCD=5×2×3=30LCD = 5 \times 2 \times 3 = 30
The least common denominator (LCD) is 30.

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