Making m the subject of the formula in the equation is m = -10(n-1)
The subject of a formula is the variable or expression that represents the quantity being solved for.
In mathematical equations, it is the element isolated on one side to determine its value based on the given information in the formula.
3n - m/2 + 5 = 8n
multiply all terms by 2
6n - m + 10 = 16n
collect like terms
-m +10 = 16n -6n
-m + 10 = 10n
-m = 10n - 10
-m = 10(n -1)
divide both sides by -1
m = -10(n-1)