anonymous
  • anonymous
help in algebra??!?!
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
7-(X+1)=9-(2X-1)
.Sam.
  • .Sam.
6-X=10-2X Add (2 X-6) to both sides: X=4
anonymous
  • anonymous
i didnt understand :S

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adunb8
  • adunb8
well bascially combine the like terms leave the x for now and add all the numbers together
adunb8
  • adunb8
on our right side we get 6-x and left side we get 10-2x
anonymous
  • anonymous
but how 6-x? isnt it 6X-6?
anonymous
  • anonymous
i mean 6x+6
adunb8
  • adunb8
lets start with right side move the negative (-) sign into the (pathenses)
adunb8
  • adunb8
what do you get?
anonymous
  • anonymous
7x-10?
adunb8
  • adunb8
|dw:1347529396345:dw|
adunb8
  • adunb8
do you get it? we move the negative sign in the outside and factored it into (2x-1) there fore 9-2x+1 and 9+1 = 10 so -2x+10
adunb8
  • adunb8
do the same thing for the left side also
anonymous
  • anonymous
ok
adunb8
  • adunb8
@sarah_98 are you getting it?
anonymous
  • anonymous
7-(X+1)=9-(2X-1) 7-x-1=9-2x+1 7-1-x=9+1-2x 6-x=10-2x 2x-x=10-6 x=4 do u understand?
anonymous
  • anonymous
7-(x+1)=9-(2x-1) 7-x-1=9-2x+1 6-x=10-2x so, x=4

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