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07-12-2016
Mathematics

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[02.03]

Solve for x: −3|x + 7| = −12

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07-12-2016

−3|x + 7| = −12

* −3(x + 7) = −12
-3x - 21 = -12
-3x = -12 + 21
-3x = 9
x = 9/-3
x = -3

* −3*[ -(x + 7)] = −12
3x + 21 = -12
3x = -12 -21
3x = -33
x=-33/3
x = -11

answer:
x = -11 and x = -3

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