Given the equation:
12x - 7 + 5x = 8 (2x + 1) + x - 8
To go about this, let's use the following steps
Step 1: Expand Parenthesis, 12x - 7 + 5x = 8 (2x + 1) + x - 8
=> 12x -7 + 5x = 16x + 8 + x - 8
Step 2: Collect like terms, with the terms having x as a variable on one side
and the constants on the other side
12x + 5x - 16x - x = 7 + 8 - 8
Step 3: Simplify the expression
17x -17x = 7 + 0
0 = 7
Since the variable x has been eliminated and the left-hand side of the equation does not correspond to the right-hand side, then, There is no solution