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49c
Subtract 19c from each side: 31 = 7c - 74Add 74 to each side: 105 = 7cDivide each side by 7: 15 = cCheck: Does 19 x 15 + 31 = 26 x 15 - 74?ie 285 + 31 = 390 - 74?ie 316 = 316? Yes, job done.
The total degrees between 45 degrees and -5 degrees is 50 degrees.
180 degrees - 100 degrees - 40 degrees = 40 degrees
30 degrees.