How do you decide which variable to isolate in order to use the substitution method to solve a system of linear equation?

1 answer:

5 0

It doesn’t really matter which variable you isolate first but usually you would use the one that’s by itself already. like for example one of the equations was y = 8. you would already have your y solve for so you would just have to plug that in for y in the other equation. personally, i usually do x first unless one of the equations has either x or y by itself already. i think its easier to just do x first and then solve for y after that, but it just depends on what the equations are; sometimes it might be easier to just do y first. hope this helps!

You might be interested in

What is 0.00340.78 correct to 3 significant figures? explain your answer

timurjin [86]

What is 0.00340.78 correct to 3 significant figures?

a significant fugure is when the number lean solething ,so its can anyone except 0

so if we are reducing 0.00340.78 to 3 significant number

first we have to look for the significant nulber ,which are 3,4,7,8

so the answer can be 0.0034.7

hopefully this helps

7 0

2 years ago

What statements describe the properties of a plane? Select three options.

Genrish500 [490]

Answer:

2)A plane has length and width.

3)A plane extends infinitely in all directions

5)A plane is a flat surface.

Step-by-step explanation:

We can think of a plane as a line in space with no height, only length and width.

Yes, a plane is a two-dimensional surface, hence it has length and width.

2)A plane has length and width (TRUE)

The plane surface extends infinitely far, therefore it extends infinitely in all direction.

3)A plane extends infinitely in all directions (TRUE)

5)A plane is a flat surface(TRUE)

The correct options are 2,3 and 5.

See attachment

7 0

2 years ago

Samantha has 1/3 hour to finish 4 chores if she divides the time equally how much time will she spend on each chore

Artyom0805 [142]

1 hour = 60 minutes

60/3 is 20 minutes

20/4 is 5 minutes

Samantha spends 5 minutes on each chore

3 0

3 years ago

Read 2 more answers

How to decompose 1 3/8

MArishka [77]

3/8 = 1/8 +1/8 + 1/8 ; 3/8 = 1/8 + 2/8 ; 2 1/8 = 1 +1 + 1/8 = 8/8 + 8/8 + 1/8.
Hope this helps!

7 0

2 years ago

The diagram shows a 91 m building with a flagpole outside. the shadows of the building and the flagpole end at point c. what is

Marta_Voda [28]

It would be 13 meters, took the same test and it was the answer lol
good luck if you haven't
already taken it!!<span />

7 0

2 years ago

How do you decide which variable to isolate in order to use the substitution method to solve a system of linear equation?​

How do you decide which variable to isolate in order to use the substitution method to solve a system of linear equation?