Cross Multiply and Divide

What is the first step in solving the equation 4/S = -2/9?

• Add 9 to both sides

• Cross-multiply the fractions

• Subtract 4 from both sides

• Multiply both sides by S

After cross-multiplying, what is the resulting equation?

• 9S = -4

• S = -18

• 4S = -18

• 36 = -2S

What operation is used to isolate S in the equation 36 = -2S?

• Division

• Addition

• Multiplication

• Subtraction

What is the value of S after solving the equation?

• -9

• 18

• -18

• 9

How can you verify the solution to the equation 4/S = -2/9?

• By multiplying both sides by 9

• By substituting S back into the original equation

• By dividing both sides by 4

• By adding 4 to both sides