Question

which equation shows the substitution method being used to solve the system of linear equations?

x - y= 7
x = y + 3

@pooja195

Answer 1

Where are the equations ?

Answer 2

A) x - ( y + 3) = 7

Answer 3

B) ( y + 3) - y= 7

Answer 4

C) x =(7 - x) + 3

Answer 5

D) x - y = y + 3

Answer 6

What do you think?

Answer 7

i dont really know

Answer 8

Take equation 2 and plug it into equation 1 in place of x since it gives you what x ='s

Answer 9

i have a question about that, how do i know which equation to start with to plug into the other one, is it always the second one or??

Answer 10

so it would b (B) then

Answer 11

Correct

Answer 12

And you would know what equation to start with if you see that a vairble is alone (if it is not alone isolate it)

Answer 13

thank you so much!

Answer 14

yw ^_^