Answer:
1.) (12+3) - 7= N
15-7= N
8 = N
N = 8
4.) (18 - 4) + (5 + 3) = N
14 + 8 = N
22 = N
N = 22
2.) 4 (6 + 8) = N
4 (14) = N
56 = N
N = 56
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Answer:
1.) (12+3) - 7= N
15-7= N
8 = N
N = 8
4.) (18 - 4) + (5 + 3) = N
14 + 8 = N
22 = N
N = 22
2.) 4 (6 + 8) = N
4 (14) = N
56 = N
N = 56