Question

$90frac{15*20}{15+20}*frac{15+20}{15*20+20(15+20)}$

Answer 1

=90 300/35 * 35/300+700=3450/35 *35/1000=3450/1000=3.45 или 3 9/20

Answer 2

the 49other is a very good example 7of of a very