Cross Multiplying: Solving Advanced Linear Equations

What is the primary purpose of cross multiplying in solving equations?

• To add fractions

• To divide fractions

• To subtract fractions

• To move terms in a fraction from one side of the equation to the other

In the equation a/B = C/D, what operation is performed to isolate 'a'?

• Multiply both sides by B

• Subtract B from both sides

• Add B to both sides

• Divide both sides by B

When solving X/3 = 5 using cross multiplication, what is the value of X?

• 20

• 15

• 10

• 5

In the equation 9/X = 3, what is the first step to isolate X?

• Divide both sides by X

• Add 9 to both sides

• Multiply both sides by X

• Subtract 9 from both sides

What is the result of solving the equation 9/X = 3 using cross multiplication?

• X = 4

• X = 1

• X = 2

• X = 3

In a complex equation with variables on both sides, what is a crucial step after cross multiplying?

• Dividing by zero

• Adding more variables

• Expanding brackets and simplifying

• Ignoring the variables

What is the final value of X in the equation solved in the last section?

• X = 4

• X = 1

• X = 2

• X = 3