Question

Will Medal
Please help
solve for x:
x-1/1+2 = 2/x

Answer 1

@IrishBoy123

Answer 2

can you draw it, do not understand what you are solving...

Answer 3

solve for x:
\[\frac{ x-1 }{ x+2} = \frac{ 2 }{ x }\]

Answer 4

multiply both sides by \((x+2)x\)

[or cross multiply, as it is called, though it is the same thing...]

Answer 5

i am going with cross, x(x-1) = 2(x+2)

Answer 6

great

Answer 7

ok, then

Answer 8

multiply out and combine terms to get a quadratic

Answer 9

x^2 - 1x = 2x+4

Answer 10

then?

Answer 11

then \(x^2 - 3x - 4 = 0\) and now factor

Answer 12

= (x+1) (x-4)

Answer 13

4 and -1

Answer 14

@Adi3 good stuff

tip: in an exam, i would actually take those numbers and put them back into the original equation just to be triply sure :p

Answer 15

how would you do that??

Answer 16

@IrishBoy123 Labhraíonn tú Gaeilge? Ansin, is féidir leat cabhrú liom ... Ní féidir leat?

Answer 17

@IrishBoy123

Answer 18

@IrishBoy123

Answer 19

oh is it foil??

Answer 20

check these

\(\frac{ -1-1 }{ -1+2} = \frac{ 2 }{ -1 }\) ???

\(\frac{ 4-1 }{ 4+2} = \frac{ 2 }{ 4 }\) ???

Answer 21

@IrishBoy123 Dhíth orm desperately do chabhair . Níorbh fhéidir leat le do thoil cabhrú liom nuair a fhaigheann tú an deis ? Tá sé éadóchasach .

Answer 22

wht did you just do??

Answer 23

plugged your answers into the original equation you were given...

Answer 24

ie plug 4 and -1 into \(\frac{ x-1 }{ x+2} = \frac{ 2 }{ x }\) to check them....

Answer 25

how would you plug two equations in x?

Answer 26

i will be around and about later, feel free to tag.

Answer 27

put them in separately

so for x = 4
\(\frac{ x-1 }{ x+2} = \frac{ 2 }{ x } \implies \frac{ 4-1 }{ 4+2} = \frac{ 2 }{ 4 }\)

that is \(\frac{3}{6} = \frac{2}{4} \checkmark\)

Answer 28

ok, medal me pls.

Answer 29

@IrishBoy123 Hilfe bitte?