Learn how to solve a proportion by applying cross multiplication

The video tutorial demonstrates how to solve a proportion using cross multiplication, emphasizing the importance of using parentheses to ensure correct distribution in expressions. It walks through solving a linear equation step-by-step, concluding with the final solution and verification of the process.

What is one method mentioned for solving proportions?

• Finding the derivative

• Using the quadratic formula

• Completing the square

• Cross-multiplication

Why does the teacher prefer not to use cross-multiplication?

• It takes too long

• It does not require understanding the problem

• It is too complicated

• It is not a valid method

Why are parentheses important when multiplying expressions in a proportion?

• They make the equation look neat

• They help in distributing terms correctly

• They are required by mathematical rules

• They simplify the equation

What is the first step in solving the linear equation derived from the proportion?

• Divide both sides by the variable

• Add terms to both sides

• Multiply both sides by a constant

• Subtract terms from both sides

What is the final solution for the variable Y in the equation?

• Y = -7/18

• Y = 7/18

• Y = 18/7

• Y = -18/7