A relationship between mathematical expressions. Like a fraction and an improper fraction
twice means "multiply by 2"
increased means "add"
2n + 4 = 18
8-/x(x-4)/x-3
That should be it if you can’t understand it the whole equation after the eight is a fraction
The answer is x= +- 2 square root of 2 + 3
12 apples / 5 apples = 2.4
0.6 kg x 2.4 = 1.44 kg.
12 apples weigh 1.44 kgs.