***Being clear is really important when writing this type of question. I'm unsure if the problem is (5x-6)/(4+3)>12, 5x-(6/4)+3>12, or (5x-6)/4 + 3>12.
***The above solution is correct if your problem was the first case situation. However, here's an important correction: solution is x>18 which is written as `(18,oo)` . Your answer is all numbers larger than 18, but not 18.
***If the problem is the last case I suggested then
Hence solution set `(42/5,oo)`
It's really easy.
First you know that 4+3=7 so you can write it down as: 5x-6/7>12
Multiply both sides by 7 and you have
5x>90 Divide both sides by 5 and you have your answer
So for every value of x>18 we will get a result that works so this interval of x goes from (-∞,17], or the solution is for every x element