write 2 2/6 as a improper fraction
increase 56 by 13 percent
9a+4b=8
a+3b=1
find the ratio of 400kg to 5kg in their simplest form
xy=12
x=4y+36
8^x-2.4^x-1 =0
Write 2 3/7 as a improper fraction
decrease 707 by 10
percent
$\frac{x}{y} = {y}^{-1}$.
decrease 180 by 30
