In this case, we'll have to carry out several steps to find the solution.
Step 01:
Data
-18=6a-6
a = ?
Step 02:
-18 = 6a - 6
-18 + 6 = 6a
- 12 = 6a
-12 / 6 = a
- 2 = a
The answer is:
a = - 2
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