In 18 minutes its 120 because you find the unit
6x + 9
First, simplify x
3x + -3x + 5x = 6x
Then, simplify the rest of the numbers:
2 + 7 = 9
Then make the equation:
6x + 9
So you need to divide 1000 by 125 which is 8. Which then you times by two to equal the two kilograms. So he needs to fill the cup up 16 times.
The mistake is in line 2, the parenthesis means multiplication therefore it has to be 3x