austinparmer
austinparmer austinparmer
  • 14-10-2015
  • Mathematics
contestada

what is the answer to 5+5(x+4)≤20?

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darth666
darth666 darth666
  • 14-10-2015

[tex]5+5(x+4) \leq 20[/tex]

[tex]5+5x+20 \leq 20[/tex]

[tex]5+5x \leq 0[/tex]

[tex]5(1+x) \leq 0[/tex]

[tex]1+x \leq 0[/tex]

[tex]x \leq -1[/tex]

Answer Link
Аноним Аноним
  • 14-10-2015
[tex]5+5\left( x+4 \right) \le 20\\ \\ 5\left\{ 1+\left( x+4 \right) \right\} \le 20\\ \\ \frac { 1 }{ 5 } \cdot 5\left\{ 1+\left( x+4 \right) \right\} \le 20\cdot \frac { 1 }{ 5 }[/tex]

[tex]\ \\ 1+\left( x+4 \right) \le 4\\ \\ 1+x+4\le 4\\ \\ x+5\le 4\\ \\ x\le 4-5\\ \\ x\le -1[/tex]
Answer Link

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