How to draw a block diagram for one equation with three variables in simulink

I am totally lost on this one. Say I have the equation y = 2*z - 5*x, how would I draw the block diagram to perform this calculation?

Answer 1

[John Petersen]

      _______    ___
z-----|  2  |___| + |
      |_____|   |___|---- y
      _______    |
x-----|  -5  |---|
      |______|

[Eristoff Abhi]

With John diagram you can use multiplier block as well as gain block also.