Question

When solving the system by substitution, what would you plug into the second equation for the letter y?

2x+y=6
2x+2y=8

y = 2

y = 6-2x

x = 6

x = 2y+6

Answer 1

2x+y=6 Solve for y by subtracting 2x from each side
y = 6-2x

Answer 2

@baldymcgee6 is right. your last question used whats called the "elimination method" to solve these equations. here you are asked to use the "substitution method".

in the substitution method, you first work out an expression for one of the variables from one of the equations, and then "substitute" this into the other equation to solve for the second variable.

Answer 3

so y= 6-2x?

Answer 4

cause thats what i guessed cause u subtract 2 from 2 and u get 0

Answer 5

That's correct

Answer 6

so thats the answer (: yay!

Answer 7

http://openstudy.com/study#/updates/506e0aeae4b060a360ff306a

Answer 8

not sure what you meant by "cause u subtract 2 from 2 and u get 0 "?

Answer 9

well it said subtract 2 from 2

Answer 10

2x from each side

Answer 11

ohh i get it now!!!

Answer 12

good :)

Answer 13

http://openstudy.com/study#/updates/506e0aeae4b060a360ff306a