1) To solve the equation 7/12n - 3 = 1/2n + 0.7, we first need to simplify both sides of the equation.

Multiplying both sides by 12 to get rid of the denominators, we get:
7n - 36 = 6n + 8.4

Now we can combine like terms:
7n - 6n = 36 + 8.4
n = 44.4

2) To solve the equation 6(x-1) = 18, we will first distribute the 6 on the left side:

6x - 6 = 18

Now, add 6 to both sides:

6x = 24

Finally, divide by 6:

x = 4