Answer:
[tex] \mathsf{ \frac{m + 21}{5} = n }[/tex]
Step-by-step explanation:
To make "n" the subject of the formula, rearrange the formula so it begins with " n = "
To isolate the variable "n", you need to inverse the other terms on that side of the equation where "n" really is.
=> m = 5n - 21
- there's a "-21" next to "5n", inverse of subtraction is addition, so add 21 on both sides of the equation.
=> m + 21 = 5n - 21 + 21
=> m+ 21 = 5n
- There's also a 5 attached to n, that means the multiplication of n with 5, the inverse of multiplication is division, so dividing both sides of the equation by 5
[tex] \mathsf{ \frac{m + 21}{5} = n }[/tex]
