Warm up by Barbara Amador

Ms. Barbara

bamador — 2013-11-25 18:14:45 UTC

When do you use substitution as the best method to solve systems of equations?

Olinto Perez

2013-11-26 18:20:13 UTC

you use substitution when the equation is not in slope-intercept form, as it is easier than the other methods and also when the variable is isolated

Ivanna

2013-11-26 18:20:15 UTC

You use substitution when you have a system in which the variable is isolated

Camila Mencia

2013-11-26 18:21:36 UTC

You use substitution best when you have an isolated variable.

Alejandro Escobar

2013-11-26 18:21:38 UTC

Substitution is the best method when one of the equations has an isolated variable.

Lauren Fonseca

2013-11-26 18:21:46 UTC

You should use substitution when one of the equations have an isolated variable.

Maggie Huang

2013-11-26 18:22:08 UTC

You use substitution when y or x is alone on one side.

Carlos Urcuyo

2013-11-26 18:22:13 UTC

When one of the linear equations in the system already has the variable isolated. Example: x=2x+3

Ji Eun Kim

2013-11-26 18:22:26 UTC

We use substitution when the set of equations they give have an equation with the variable isolated.

Karla Guevara

2013-11-26 18:22:38 UTC

You use substitution as the best method to solve systems of equation when in one of the equations the variable is isolated.

Jorge Huerta

bhuerta — 2013-11-26 18:22:39 UTC

The best time to use subsitution to solve system of equations is when one equation already has one variable isolated as in x=

Alejandra Garcia

2013-11-26 18:22:58 UTC

You use substitution as the best method to solve systems of equations when one of the variables is isolated. It is also easier when you just have to divide or multiply to get one of the variable isolated.

Víctor Hondoy

2013-11-26 18:23:39 UTC

You use substitution when the value of a variable is given so you can replace the variable of the other equation and therefore get the answer.

Natalie Blandon

2013-11-26 18:24:24 UTC

you use substitution when a variable is already isolated and you use the value to solve.

Mariela Guadamuz

2013-11-26 18:24:40 UTC

Jae Cheol Lee

2013-11-26 18:25:07 UTC

We can use the substitution when we need to isolate an equation. For example this two equations:

x+y=5

y=3