Question 433604
0.4x+5 < or equal to 0.8x-2 
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0.4x+5 <= 0.8x-2
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Add 2 to both sides
0.4x+7 <= 0.8x
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Subtract 0.4x from both sides:
7 <= 0.4x
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Rearrange:
0.4x >= 7
x >= 70/4
x >= 17 1/2
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Cheers,
Stan H.