Solving Rational Equations in Algebra

The video tutorial covers solving equations involving fractions and a work-rate problem. In the first section, the instructor demonstrates how to solve an equation with fractions on both sides by cross-multiplying and simplifying. The second section addresses a work-rate problem where two people mow a yard together, explaining how to set up and solve the problem using fractions to find the time taken to complete the task.

What is the first step in solving an equation with fractions on both sides?

• Cross-multiply

• Add the fractions

• Subtract the fractions

• Divide both sides by a common factor

When cross-multiplying the equation x + 5 * 2x + 8 = x + 4 * x - 2, what is the next step?

• Subtract x from both sides

• Add x to both sides

• Factor out common terms

• Foil the expressions

What can be factored out from 2x + 8 to simplify the equation?

• 8

• 2

• 4

• x

After factoring and simplifying, what is the resulting equation before solving for x?

• 2x + 10 = x - 2

• x + 5 = 2x + 8

• x + 4 = x - 2

• 2x + 8 = x + 4

What is the value of x after solving the equation 2x + 10 = x - 2?

• -12

• -10

• 10

• 12

Why is it important to verify the solution by plugging it back into the original equation?

• To check for calculation errors

• To ensure the solution is positive

• To confirm it doesn't result in zero denominators

• To simplify the equation further

How long does it take John to mow the yard alone?

• 1 hour

• 2 hours

• 3 hours

• 4 hours

How long does it take Sarah to mow the yard alone?

• 1 hour

• 4 hours

• 2 hours

• 3 hours

What is the combined rate of John and Sarah mowing the yard together?

• 1/2 yard per hour

• 1 yard per hour

• 1/3 yard per hour

• 5/6 yard per hour

How long will it take John and Sarah to mow the yard together?

• 2 hours

• 1 hour

• 1.2 hours

• 1.5 hours