when using the substitution method, which expression for y in the second equation would be substituted in the first equation? Equation 1: 2x-2y = -12 Equation 2: 4x - y = 3

Question

jhonyy9 · Answer

2x -2y = -12
4x -y =3 ---- y = ?

jhonyy9 · Answer

wann you cooperate ?

jhonyy9 · Answer

ok 

try adding to both sides y and check what you will get ?

jhonyy9 · Answer

are you here ?

anonymous · Answer

sorry! yes i am! wait whats substitution method?

jhonyy9 · Answer

ok 

so try making what i have wrote to you above

jhonyy9 · Answer

substitution method -- what mean ? you dont have learned again ?

anonymous · Answer

this is for online, and the lessons are that descriptive

anonymous · Answer

aren't*

jhonyy9 · Answer

ok 

so 

2x -2y = -12
4x -y =3 ---- y = ?

add to the both sides y than what will get ?

jhonyy9 · Answer

on second equation

anonymous · Answer

4x = 3 + y ?

jhonyy9 · Answer

yes 

and now add to both sides (-3)

anonymous · Answer

4x - 3 = y

jhonyy9 · Answer

so with this you have got the y= 4x-3 from second equation 

than now using the substitution method you need just subtituting in place of y inside first equation this y= 4x-3

ok ?

anonymous · Answer

so 2x - 2 (4x-3) = -12 ?

jhonyy9 · Answer

yes and continue

anonymous · Answer

what do i do when i get that answer? plug in x for the second equation ?

jhonyy9 · Answer

continue please and i will help you understanding all

anonymous · Answer

i got x = 3 .

jhonyy9 · Answer

ok

and now subtitute this value of x = 3 in place of x inside y = 4x-3

anonymous · Answer

y = 9

jhonyy9 · Answer

ok

jhonyy9 · Answer

do you understand it now ?

anonymous · Answer

wait what would my answer be then??

jhonyy9 · Answer

why ? if you check newly you get the right answer

what is the y= ? from second equation

anonymous · Answer

9

jhonyy9 · Answer

yes but the question was what will be the expression of y from second equation what you need subtituting in place of y in first equation using the substitution method

anonymous · Answer

is my answer -4x + 3 ?

jhonyy9 · Answer

why -4x+3 ?

jhonyy9 · Answer

you need just checking above what you have substituted in place of y inside first equation

anonymous · Answer

what , this doesn't make sense . and these are my answer choices 
 		
-4x - 3
		
-4x + 3
		
4x - 3
		
4x + 3

jhonyy9 · Answer

so above you have got this 

4x - 3 = y

jhonyy9 · Answer

are you here ?

jhonyy9 · Answer

ok ?