Question

help please! which of the folloxing expressions is equivalent to 20-4/5x>16?
a. x<5
b. x>5
c. x>32 1/2
d. x< 32 1/2

Answer 1

All we need to do is simply isolate x.
\[20-\frac{ 4 }{ 5 }x>16 \rightarrow -\frac{ 4 }{ 5 }x>-4\]
Whenever we multiply or divide by a negative, we must flip the sign of the inequality. \[\frac{ 4 }{ 5 }x<4 \rightarrow \bbox[4px,border:1px solid black]{x<5}\]

Answer 2

ok thanks I get it :)

Answer 3

You are welcome :)