n - 10
87
A number decreased by 4 is n-4
It is 5n - 8 <= 2n + 10
"Decreased by" just means "minus," so that's C-11.
60
24
60.8
3 decreased by a number
18
87
60
m-10<25
"Still" implies that the original number is a square number. In that case, the answer is as follows: There is no number such that it is a perfect sqiuare and that the number increased (or decreased) by 10 is also a perfect square. And if you do not limit it to perfect square then every non-negative number is a square with the number that is 10 more also being a square.
The expression is: 6x-10 which can be factored to 2(3x-5)
15
-10-18x
To write the equation based on the given statement, let the number be represented by ( x ). The phrase "20 decreased by two times a number" translates to ( 20 - 2x ), and "10 less than three times the number" translates to ( 3x - 10 ). Therefore, the equation is: [ 20 - 2x = 3x - 10. ]