Given data:
Number of members in North Carolina = 50
Unknown:
Number of members in North Carolina house of representatives = ?
To solve this problem, the second sentence is very important; let us construe it.
Let the number of members in North Carolina house of representatives = N
Then,
Number of members in North Carolina = N - 70
Since it is 70 fewer;
So, input the given number of members in North Carolina;
50 = N - 70
N = 50 + 70 = 120
Number of members in North Carolina house of representatives is 120.