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December 21, 2014

December 21, 2014

Posted by **Mimi** on Monday, November 22, 2010 at 10:28pm.

2│2x-7│+11=25

- math -
**Emily**, Monday, November 22, 2010 at 10:32pmYou want to get the absolute value portion of the equation alone first. They you can find what x would equal if it were (2x-7) = blah and if -(2x-7) = blah.

- math -
**Heather.**, Monday, November 22, 2010 at 10:36pm2„ 2x-7„ +11=25

-11 -11

2„ 2x-7„ =14

4x +14 = 14

-14 -14

4x = 0 Divide both by 4

x = 0

Check

2„ 2(0)-7„ +11=25

2„ 0 -7„ +11=25

2„ -7„ +11=25

14 + 11 =25

25 =25

- math -
**Emily**, Monday, November 22, 2010 at 10:43pmin addition to x=0, x=7

2[2x-7]+11=25

2[2x-7]=14

[2x-7]=7

2x=14

x=7

Check

2[2(7)-7]+11=25

2[7]+11=25

14+11=25

25=25 :D

- math -
**Reiny**, Monday, November 22, 2010 at 11:25pm2│2x-7│+11=25

|2x-7| = 7

then 2x-7 = 7 or -2x + 7 = 7

2x = 14 or 2x = 0

x = 7 or x = 0

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