Question

Make n the subject of the formula: M=3n

Answer 1

M=3n

divide both sides by 3. 3n divided by 3 is n (the subject) and M divided by 3 is M/3 (fraction)
therefore the answer is:
n=M/3

Answer 2

we have been given an algebraic equation with 2 unknown terms M and n

we have to make n the subject of the given formula that is

M = 3n

Making n the subject means that the algebraic term we have to find out/solve is n

so when we make n the subject it needs to be the only term on one side of the equation

usually our subject should be on the left side of the equation

so lets switch sides

M = 3n --> 3n = M

now we have to make n the only term so we have to remove the coefficient of n which is 3

we have to do the reverse operator

3n is when 3 x n -- operator is multiplication

reverse operator of multiplication is division

so we have to divide both sides of the equation by 3

`(3n)/(3) = (M)/(3)`

then the formula becomes

`n = (M)/(3)`