JL081403 JL081403

25-08-2016
Mathematics

contestada

4|2x+7|=16
x=? and x=?

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texaschic101 texaschic101

25-08-2016

4 | 2x + 7 | = 16...divide both sides by 4
| 2x + 7 | = 16/4
| 2x + 7 | = 4

2x + 7 = 4 -(2x + 7) = 4
2x = 4 - 7 -2x - 7 = 4
2x = -3 -2x = 4 + 7
x = -3/2 -2x = 11
x = -11/2

so x = -3/2 and x = -11/2

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