The equation is: 6 x 70 = 6 x 7n
In order to find n you will need to get n alone.
Step 1: 6 x 70 = 6 x 7n (Original question)
Step 2: 420 = 6 x 7n
Step 3: 420 = 42n
Step 4: 42n = 420
Step 5: Divide 420 by 42 (to get n alone)
Step 6: n = 420/42
Step: Reduce it to get your answer: n = 10