Triple a number, x, increased by 1 is between -20 and 10. What are the solutions for x?

1 answer:

3 0

Hello,
$-20 \leq 3x+1 \leq 10\\
\Rightarrow\ -21 \leq 3x \leq 9\\
\Rightarrow\ -7 \leq x \leq 3\\

Sol=[-7\ 3]\ if\ x\ is\ a\ real.
$

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