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# Let A And B Be Rational Numbers: A Basic Overview

In basic mathematics, rational numbers are defined as any number that can be expressed as a ratio of two integers. In other words, a rational number is a number that can be expressed as a fraction. To be more specific, any number that can be expressed as a fraction with a denominator that is not equal to zero is considered a rational number. For example, the number 7 can be expressed as 7/1, while the number 0.5 can be expressed as 1/2. In this article, we will take a closer look at what it means to let A and B be rational numbers.

## What Does it Mean to Let A and B be Rational Numbers?

When mathematicians use the phrase “let A and B be rational numbers”, they are referring to two numbers that can be expressed as a fraction with a non-zero denominator. The two numbers are then used in an equation or formula to solve a problem. For example, if you were asked to solve the equation 3x+4y = 10, the first step would be to let A and B be the two numbers that make up the equation. In this case, A would be 3x and B would be 4y. Once A and B are known, you can begin to solve the equation by isolating one of the variables.

## Examples of Letting A and B be Rational Numbers

One example of letting A and B be rational numbers would be to solve the equation 5x+6y=12. In this equation, A is equal to 5x and B is equal to 6y. To solve for x and y, you would first need to isolate one of the variables. In this case, you could start by subtracting 6y from both sides of the equation. This would leave you with 5x = 12 – 6y. Now, to isolate x, you would need to divide both sides of the equation by 5. This would leave you with x = (12-6y)/5. Now that x has been isolated, you can easily solve for y by substituting the value of x into the original equation. This would leave you with 6y = 12 – 5x. To isolate y, you would just need to divide both sides of the equation by 6. This would leave you with y = (12-5x)/6. Thus, the solution to this equation is x = (12-6y)/5 and y = (12-5x)/6.

## What Are the Benefits of Letting A and B be Rational Numbers?

There are many benefits of letting A and B be rational numbers. For one, it makes solving equations much simpler. By expressing the variables in the equation as rational numbers, it makes it easier to isolate one of the variables and then solve for the other. It also allows for the use of various mathematical operations, such as addition, subtraction, multiplication, and division. Finally, it makes it easier to find the exact solution to an equation, which can be difficult if the equation is expressed with irrational numbers.

## Conclusion

Letting A and B be rational numbers is a useful concept in basic mathematics. By expressing the variables in an equation as rational numbers, it makes it easier to solve the equation and find the exact solution. There are also many benefits to expressing the variables as rational numbers, such as allowing for the use of various mathematical operations and making it easier to isolate one of the variables. Hopefully, this article has helped you understand what it means to let A and B be rational numbers.

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