Solve a proportion by multiplying by the LCD ex 13, (2n - 9)/7 = (3 - n)/4

The video tutorial explains how to solve a proportion by eliminating fractions using the least common denominator (LCD) and the cross product method. It demonstrates the application of the distributive property to simplify equations and solve for the variable N. The tutorial concludes with the final solution, showing the step-by-step process to reach the answer.

What is the first step in solving a proportion with fractions?

• Subtract the fractions

• Multiply by the least common denominator

• Divide by the largest number

• Add the fractions together

What is the least common denominator of 7 and 4?

• 35

• 28

• 21

• 14

What property is used to simplify the equation after multiplying by the LCD?

• Commutative Property

• Identity Property

• Distributive Property

• Associative Property

How do you isolate the variable N in the equation?

• Add the same number to both sides

• Multiply both sides by zero

• Divide both sides by the coefficient of N

• Subtract the variable from both sides

What is the final simplified form of N in the given problem?

• 57/15

• 15/4

• 21/5

• 19/5