Question

What is the answer to 5+5(x+4)≤20?

Answer 1

$5+5\left( x+4 \right) \le 20\\ \\ 5\left\{ 1+\left( x+4 \right) \right\} \le 20\\ \\ \frac { 1 }{ 5 } \cdot 5\left\{ 1+\left( x+4 \right) \right\} \le 20\cdot \frac { 1 }{ 5 }$

$\ \\ 1+\left( x+4 \right) \le 4\\ \\ 1+x+4\le 4\\ \\ x+5\le 4\\ \\ x\le 4-5\\ \\ x\le -1$

Answer 2

$5+5(x+4) \leq 20$

$5+5x+20 \leq 20$

$5+5x \leq 0$

$5(1+x) \leq 0$

$1+x \leq 0$

$x \leq -1$