Respuesta :
The like terms in the expression are 21x and -x.
The other like terms are +6-5
so 21x+-1x is 20x
+6-5 is 1
so 20x+1 is your answer...
The other like terms are +6-5
so 21x+-1x is 20x
+6-5 is 1
so 20x+1 is your answer...
