Whats x-3x in 2+x-14-3x+1 I've solved the numbers and its -11 but how do i calculate x - 3x?

x-3x  

 

what is 7X-2X?  7crosses -2crosses = (7-2)crosses = 5 crosses = 5x

x-3x = 1cross - 3 crosses = (1-3)crosses = ??? Do you know what 1-3 is?