Asked by luma

find the answer of the set for the inequality −2 ≤ 1 − (2 + 4x) < 3?
Answered by Steve
−2 ≤ 1 − (2 + 4x) < 3
-3 ≤ -(2+4x) < 2
3 >= 2+4x > -2
1 >= 4x > -4
1/4 > x > -1

See the graph at

http://www.wolframalpha.com/input/?i=plot+y%3D+1+%E2%88%92+%282+%2B+4x%29%2C+y+%3D+-2%2C+y%3D3
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