Solving Proportions and Equations

Jimmy Chang explains how to solve proportions using cross multiplication. He provides two examples: one with X in the numerator and another with X in the denominator. The video emphasizes the simplicity of solving proportions once cross multiplication is mastered.

What is the common strategy used to solve proportion problems?

• Cross multiplication

• Subtraction

• Division

• Addition

What mathematical concept do proportions often involve?

• Fractions

• Exponents

• Logarithms

• Decimals

In the example X/10 = 5/9, what is the first step in solving for X?

• Subtract 5 from both sides

• Add 10 to both sides

• Cross multiply

• Divide by 9

After cross multiplying in the equation X/10 = 5/9, what is the resulting equation?

• 9X = 50

• 10X = 45

• X = 9/50

• X = 50/9

What is the final value of X in the equation X/10 = 5/9?

• 9

• 5

• 10

• 50/9

What is the common factor between 50 and 9 in the fraction 50/9?

• 1

• 5

• 9

• None

In the equation 6/X = 3/2, what is the first step to solve for X?

• Add 6 to both sides

• Cross multiply

• Divide by 3

• Subtract 2 from both sides

What is the resulting equation after cross multiplying 6/X = 3/2?

• 3X = 12

• X = 6/3

• 2X = 18

• X = 2/3

What is the value of X in the equation 6/X = 3/2?

• 4

• 3

• 6

• 2

What happens to the 3s in the equation 3X = 12 when solving for X?

• They are multiplied

• They cancel out

• They are subtracted

• They are added