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Three fourths of a number decreased by nine is at least forty-two. As an inequality.

User Wharfdale
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(3x/4) - 9 > 42

that > should be underlined to get the "or equal" in there
User Archmede
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2 votes

Answer

x ≥ 68


Step-by-step explanation

let that number be x.

(3/4) of x = (3/4) × x

= 3x/4

Decrease 3x/4 by 9,

3x/4 - 9

This expression is at least 42,

∴ 3x/4 - 9 ≥ 42

3x - 36 ≥ 168

3x ≥ 168 + 36

3x ≥ 204

x ≥ 68


User Mark Renouf
by
8.1k points

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