solve |1 - 4x| > 7 a. {x|x < -1.5 ∪ x > 1.5} b. {x|x < -1.5 ∪ x > 2} c. {x|-1.5 < x < 2}
1 answer:
<span>|1 - 4x| > 7
</span>(<span>1 - 4x) > 7 or (</span><span>1 - 4x) < -7
-4x > 7 - 1 or -4x < -7 - 1
-4x > 6 or -4x < -8
x < 6/-4 or x > -8/-4
x < -1.5 or x > 2
</span><span>{x|x < -1.5 ∪ x > 2}</span>
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