Question

5X +3Y = 2 and 6X and 4Y=9 I can not get them to equal

Answer 1

yes.

Answer 2

but for realz i don't understand what you're trying to say.

Answer 3

just the "and 6X and"

Answer 4

I have to put numbers in the x and y to get them to equal 2 for the first prob and 9 on the second prob thanks

Answer 5

I should have put in a + sign for and sorry

Answer 6

igggghhht so you got:
5x + 3y = 2
and
6x + 4y = 9

well one thing you can do is to get rid of one coefficient, let's say the y one.
mutliply the first equation by 4, and the second one by 3, then substract them:

20x + 12y = 8
-
18x + 12y = 27
=
2x = -19
x = -19/2

plug that in ant of the initial equations to find y

Answer 7

I understand what you did here..thank you very much. My student is saying thank you also. How do you do it for Y? Plug in the X answer for Y and solve?

Answer 8

exactly, you can plug it in the first or second initial equation and it should give you the same answer

Answer 9

we get 190 =8 ..does that make sense?
23.75 = y ..does that sound right?

Answer 10

we get two different answers, 23.75 and 171

Answer 11

oops she got 23.75 for first equation and 6.3 for the second equation

Answer 12

ok well if we have x = -19/2:

5x + 3y =2
-95/2 + 3y = 2
y = (2 + 95/2)/3 = 16.5

6x + 4y = 9
-57 + 4y = 9
4y = 66
y = 66/4 = 16.5

Answer 13

You are really good. Mariah says thanks and what about 2x +5y =16 and 4x +7y=23