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Vera_Pavlovna [14]
3 years ago
13

What are the absolute value answers to 5n+24=|8-3n|?

Mathematics
2 answers:
Tema [17]3 years ago
5 0
5n+24=|8-3n|\\
5n+24\geq0\\
5n\geq-24\\n\geq-\dfrac{24}{5}\\
8-3n=5n+24 \vee 8-3n=-5n-24\\
8n=-16 \vee 2n=-32\\
n=-2 \vee n=-16\\\\
-16\not\geq-\dfrac{24}{5} \Rightarrow \boxed{n=-2}
Alla [95]3 years ago
4 0
\hbox{the domain:} \\
5n+24 \geq 0 \\
5n \geq -24 \\
n \geq -\frac{24}{5} \\
n \geq -4 \frac{4}{5}

5n+24=|8-3n| \\
5n+24=8-3n \ \lor \ -(5n+24)=8-3n \\
5n+3n=8-24 \ \lor \ -5n-24=8-3n \\
8n=-16 \ \lor \ -5n+3n=8+24 \\
n=-2 \ \lor \ -2n=32 \\
n=-2 \ \lor \ n=-16

n=-2 \geq -4 \frac{4}{5} \hbox{ - it is a solution} \\&#10;n=-16 < -4 \frac{4}{5} \hbox{ - it isn't a solution} \\ \\&#10;\boxed{n=-2}
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