Respuesta :

texaschic101
m + 20 = 9
u need to subtract 20 from both sides because u want to isolate m

m + 20 = 9
m + 20 - 20 = 9 - 20
m = - 11
meerkat18
In the given expression, m + 20 = 9, the first step to take to extract the value of m is to transpose 20 from the left side to the right side. Transposition means applying an operation that is opposite to the operation of the number to be transferred. Hence the operation applied should be subtraction. The answer is D.Subtract 20 from each side.