Answer :
[tex]2(x-4)+14\leq x-1\\
2x-8+14\leq x-1\\
2x-x\leq-1+8-14\\
x\leq-7[/tex]
[tex]2(x-4)+14\leq x-1\\2x+2(-4)+14\leq x-1\\2x-8+14\leq x-1\\2x+6\leq x-1\ \ \ \ |subtract\ 6\ from\ both\ sides\\2x\leq x-7\ \ \ \ |subtract\ x\ from\ both\ sides\\\boxed{x\leq-7\to x\in(-\infty;-7]}[/tex]
