[[5,x+3],[x+5,5]]
[[5,x+3],[x+5,5
decrease 300 by 82%
+90-+6
make r the subject
A=πr^2
-90+-6
-90++6
fully simplify 13x/2x - 5/x
express the ratio of 1500 meters to 2 kilometers to simplest form
\dfrac{ 6 }{ \sqrt{ x-1 \phantom{\tiny{!}}} } -2 \sqrt{ x-1 \phantom{\tiny{!}}} = 1
sub duplicate ratio