'the sum of a number and four' means
[tex](x+4)[/tex]And three times that is
[tex]3(x+4)[/tex]Then, that 'equals to five times a number'
[tex]5x[/tex]'decreased by two':
[tex]5x-2[/tex]So, the statement is translated into the equation:
[tex]3(x+4)=5x-2[/tex]The correct answer is option A