Answer:
Prime numbers are numbers that cannot be divided into further whole numbers. You cannot divide 19 and 13 because 13 and 19 are already prime numbers.
Step-by-step explanation:
Answer:
-1 < x
Step-by-step explanation:
-10 < x - 9
+9. +9
-1 < x
20
This is because
2x+(6x+20)=180
8x+20=180
8x=160
8x/8=160/8
X=20