you can add Mod 12, this is like clock math. If it is 11 o'clock and you add 2 hours, it is then 1 o'clock. This is called addition Mod 12.
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1 p.m. (13.00) because then it will be 11 a.m. add 2 hrs
add -10... 11 + (-10) = 11-10=1 ur welcome! So that would be 2x + 11 = 1 where x = -5.
The numbers are -1 and -11 because -1 times -11 = 11 and (-1)+(-11) = -12
2x - 3y = 4 x + 4y = 3 Write the augmented matrix: 2 -3 4 1 4 3 Multiply the first row by 1/2: 1 -3/2 2 1 4 3 Subtract the second row from the first row: 1 - 3/2 2 0 -11/2 -1 Multiply the second row by -2/11: 1 -3/2 2 0 1 2/11 Multiply the second row by 3/2 and add it to the first row: 1 0 25/11 0 1 2/11 Thus x = 25/11 and y = 2/11 Check:
2 + 171=173 1 + 7 + 3 = 11 < 18