Question

can anyone explain me the last 3
i can't understand

help

:-\

:'(​

Answer 1

3 ^ 3n - 3m = 3 ^ -3

Removing equal bases on both sides

3n - 3m = -3

3( n-m) = 3×( -1)

n - m = 3×( -1)/3

n- m = -1

By transformation

1 = m-n

m - n =1

Answer 2

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