Question 504366
5|5x+7|+2 <= 21
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Subtract 2 from both sides:
5|5x+7| <= 19
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Divide by 5 to get:
|5x+7| <= 19/5
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-19/5 <= 5x+7 <= 19/5
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Multiply by 5 along the line:
-19 <= 25x + 35 <= 19
Subtract 35 along the line:
-54 <= 25x <= -16
Divide by 25 along the line:
-54/25 <= x <= -16/25
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Cheers,
Stan H.
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