Answer: X= -1
Step-by-step explanation:
It's A. all you need to do is plug in the "n"-values for each equation and see if it is true. the only one that works is answer A.
Answer:
21 - n = 7 ; n = 14
Step-by-step explanation:
21 - 14 = 7
7 + 14 = 21
14 is 7 multiplied by 2 and 21 is 7 multiplied my 3