Question

0.7x+6 is equal to or less than 1.5x-5 , the solution set is{x/x ??}

Answer 1

You have:
\[0.7x+6 \le 1.5x-5 \rightarrow 0.7x+11 \le 1.5x\]
(add the 5)
Subtract the .7x giving:
\[11 \le .8x \rightarrow 11 \le \frac{8x}{10}\]
Divide by 8/10 or multiply by 10/8 giving:
\[\frac{110}{8} \le x\]
That simplifies to:
\[\frac{55}{4} \le x\]
So your solution set would be:
\[\left\{ x \in \mathbb{R} |\frac{55}{4} \le x \right\}\]

Answer 2

As long as my algebra is correct.