Question

What is the x-coordinate of the solution to the system of equations?

3x – 2y = –30
6x + 3y = 3

_________

Answer 1

1) 3x − 6y = 3
. . 7x − 5y = −11

-5(3x − 6y = 3)
6(7x − 5y = −11)

-15x + 30y = -15
42x − 30y = −66
--------------------------
27x = -81
x = -3
If x = -3 and 7x − 5y = −11, then

7x − 5y = −11
7(-3) − 5y = −11
-21 - 5y = -11
-5y = 10
y = -2 <==ANSWER for y
(-3,-2) is the solution

Answer 2

2) 3x + y = 11
. –3x + 2y = 1
----------------------
3y = 12
y = 4 <==ANSWER
(7/3,4) is solution

Answer 3

3) The three Math Idol judges have been eliminating contestants all day! The number of one-step equations and two-step equations who have been eliminated today is equal to 1150. If three times the number of one-step equations minus twice the number of two-step equations is equal to 1300, how many one-step equations auditioned today?

x + y = 1150
3x - 2y = 1300


2( x + y = 1150)
3x - 2y = 1300

2x + 2y = 2300
3x - 2y = 1300
-----------------------
5x = 3600
x = 720 <==ANSWER for one step equations

Answer 4

4) 3x + y = 6
. . 6x + 2y = 8

-2(3x + y = 6)
. .6x + 2y = 8


-6x - 2y = -12
6x + 2y = 8
--------------------
0 = -4

That's never true, so there is no x value as there is no solution to the system. <==ANSWER

Answer 5

5) 4x + 2y = 6
. . x – y = 3

4x + 2y = 6
2(x – y = 3)


4x + 2y = 6
2x – 2y = 6
------------------
6x = 12
x = 2 <==ANSWER

Answer 6

hope that is right

Answer 7

So x=2 not 3?

Answer 8

and thanks for the medal btw i was loveheart but i got hacked out of my account and i have had this account so its Kimberly thanks for trying to get him out

Answer 9

and yes x = 2

Answer 10

Oh, hey kimberly!

Answer 11

hey i am not shear if you got me messages from arlyar when i do get that account back i will say

Answer 12

if you do not bolev it is me i will change i pic to the one that i had in the first place

Answer 13

@NormaValenzuela are you still there

Answer 14

I believe its you.

Answer 15

and thxs for the help...but i got more questions.

Answer 16

ok close this one and tag me