Simplify the numercial expression 13-2x5

you multiply 2x5=10 then,

subtract 13-10=3

i have a easier way to do it its called PEMDAS because first you do

Parentheses

Exponents

    Multiply

or Devided (which ever comes first)

    Addition

or Subtract (which ever comes first)

the link still does not work even when adding it to the url bar

explanation:

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante