-1
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-1.
subtracting a negative (- -) is the same as normal addition (adding a positive [+ +]).
The number is 21.
Subtract 6 from each side: 5x = 35Divide each side by 5: x = 7
8 1/6 - 2 5/6 = 5 1/3. Here's how I did it. Borrow a 1 from the 8 and change it to 6/6 & add to 1/6, so you have 7 and 7/6. Subtract 5/6 from 7/6 = 2/6, which equals 1/3. Subtract 2 from 7 = 5.
x=1, y=1
3n + 6 = -9 Subtract 6 from both sides: 3n = -15 Divide both sides by 3: n = -5 Therefore n = -5