At about the 1:54 mark, the teacher does not multiply the right hand side of the equation by 20 after he multiplies everything on the left hand side by 20. His final answer is also wrong because of this; he should get 15x+8y=20.
In this lesson, we learn how to put an equation in standard form when dealing with fractions. Standard form requires that the coefficient of the x variable cannot be negative, and the common factor between A, B, and C must be one or the least common factor. To eliminate fractions, we find the least common denominator and multiply each term by it. Finally, we cannot have a negative A, so if necessary, we divide by negative one. With these steps, we can easily convert equations into standard form.
Putting an equation in standard form when you have fractions
I show how to solve math problems online during live instruction in class. This is my way of providing free tutoring for the students in my class and for students anywhere in the world. Every video is a short clip that shows exactly how to solve math problems step by step. The problems are done in real time and in front of a regular classroom. These videos are intended to help you learn how to solve math problems, review how to solve a math problems, study for a test, or finish your homework. I post all of my videos on YouTube, but if you are looking for other ways to interact with me and my videos you can follow me on the following pages through My Blog, Twitter, or Facebook.
Questions answered by this video:
How do I get a linear equation into standard form when the coefficients of x and y are fractions?
How do I write (-3/4)x=(2/5)y-1 in standard form?
Currently 3.0/5 Stars.
This lesson shows how to get a linear equation into standard form when the coefficients in front of x and y are fractions.