(28.8 + 5.5x + 3.2) △ 2 = solve equation

(28.8 + 5.5x + 3.2) △ 2 = solve equation

It's not an equation

1 / 5 △ 1 / 5x = 1 / 5, solve the equation!

1/5÷1/5x=1/5
1/5X=1/5÷1/5
1/5X=1
X=1÷1/5
X=5

Solve equation 12 / (0.5x-10) = 6
12/（0.5x-10）=6
Wrong number here
Should be
12/（0.5x-1）=6

Original form=
12=6(0.5x-10)
3x-60=12
3x=72
x=24

Solving the equation (5x-6 + 12) - (5x-6) = 12
If you divide the candy into five, you will get six out of the remaining 12. How many people are there

（5x-6+12）-（5x-6）=12
5x-6+12-5x+6=12
0x=0
So this equation has an infinite number of solutions
Is your question "if you divide the candies, five for each person, there will be 12 left, and six for each person, how many people are there?"
If so, X people can be set up
5x+12=6x-6
We get x = 18