Answer:

Step-by-step explanation:
A=


So you add :

To get

Then you do :

To get :

Answer is :

Answer:
0=0
Step-by-step explanation:
Answer:
r=9
Step-by-step explanation:
13r=117
r=117/13
r=9
Answer:
12
Step-by-step explanation:
2+5=7
7+5=12
Pattern of +5