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OpenStudy (anonymous):
Solve the inequality: 150 ≤ 30x + 10x ≤ 200
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OpenStudy (anonymous):
30x+10x is the same as 40x. So 40x has to be greater than or equal to 150, but less than or equal to 200, so \[x \ge150/40=3.75, x \le200/40=5\] so\[3.75\le x \le5\]
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