N+2/7=1 1-k=23/56 реши уравнения плиз

Question

N+2/7=1
1-k=23/56
реши уравнения плиз

Answer 1

N + 2/7 = 1
N = 1 - 2/7
N = 7/7 - 2/7
N = 5/7
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1 - k = 23/56
k = 1 - 23/56
k = 56/56 - 23/56
k = 33/56

Answer 2

N= 1-2/7=5/7
k=1-23/56=33/56