Question

5x-y=33,5x+6y=-23

Answer 1

are these simultaneous equations or do you want them solved seperately

Answer 2

equation

Answer 3

if simultaneous equations,

5x -y=33 and multiply second eq by -1 to get -5x-6y=+23
then add these together... 5x and -5x cancel. -y and -6y = -7y
and finally 33 and 23 = 56
so we have -7y=56, or 7y=56, y = 56/7 = 8

Answer 4

then you can substitute y in the first equation to find x

Answer 5

it is unlikely that they are asking for these to be solved seperately.
it is more likely they are simultaneous equations, yes?

Answer 6

yes a soution on a graph with 2 points

Answer 7

Note I said "so we have -7y=56, or 7y=56" this is an error, it should be
7y=-56, so y=-8 sorry bout that!

Answer 8

k

Answer 9

so the second part is:
5x -y=33
5x-(-8)=33
5x+8=33
5x=33-8
5x=25
x=25/5
x=5

so your point is (5,-8)

Answer 10

thanks are these consistant

Answer 11

you can check your answer by substituting x and y in the second equation as follows:
5x+6y = -23
5(5)+6(-8)=-23
25-48=-23
-23=-23
so therefore the values for x and y (5,-8) are correct.

Answer 12

-14 less then or equal to3x +4 and3x+4less then10

Answer 13

thanks

Answer 14

what about it? I am new here, all of about 10 minutes new here,so don't speak shorthand yet.

Answer 15

do you want me to solve this inequality?

Answer 16

please thanks

Answer 17

okay..one moment

Answer 18

I presume you mean -14 <=3x+4<10.

Answer 19

yes

Answer 20

so we can divide this into 2 equations:
3x+4 =10
and 3x +4 = -14
first: 3x=10-4
3x=6
x=6/3
x=2

Answer 21

3x+4=-14
3x=-14-4
3x=-18
x=-18/3
x=-6

Answer 22

so, your values for x go between -6 and 2
let's check a value between -6 and 2
for example lets try -2:
3(-2)+4 = -6+4
-6+4 = -2
this is between -14 and 10 therefore it is a possible answer
so your answer should be
-6<= x <=2

Answer 23

In english that would read, x is greater than or equal to -6 and less than or equal to 2

Answer 24

or put more simply x is between -6 and 2

Answer 25

\[-6\ge x \le 2\]

Answer 26

like I said only 10 minutes here, so didnt realise they had an equation editor

Answer 27

Is that all Louise7413310?

Answer 28

or is there another problem I can help with?