Question

a/2 - a/5 + 7= 10, a=?
Heelp me.

Answer 1

fractions are annoying, the way we deal with more than one fraction is we make a common denominator, which means we try to get the bottom number the same on each fraction

for example \[\frac{1}{2} + \frac{1}{3} = \frac{3}{6} + \frac{2}{6} = \frac{5}{6}\]

in this case we have a/2 and a/5, so we want to get them both over the lowest common denominator which is 10

\[\frac{a}{2} = \frac{5a}{10}\]

can you do the other?