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How to solve: 2x-4(x+7)≤13
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How to solve: 2x-4(x+7)≤13
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Apr 3, 2017
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How to solve:
2x-4(x+7)≤13
Mathematics
middle-school
Piet
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2x - 4(x + 7) ≤ 13
2x - 4x - 28 ≤ 13
-2x ≤ 41
x ≥ 41/(-2)
x ≥ -20.5
The inequality sign is changed once you divide with a negative sign. Trust me.
Sukhjinder Singh
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Apr 4, 2017
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Sukhjinder Singh
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2x-4(x+7)<=13
⇒ 2x-4x-28 <=13
⇒ -2x <= 13+28
⇒ -2x <= 41
⇒ x >= 41/(-2)
⇒ x >= -20.5
The final answer is x ≥ -20.5
~
Hemant
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Apr 8, 2017
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Hemant
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