8
15+b = 23 Subtract 15 from both sides b = 8
160
15
38
9/23 - 5/23 = 4/23.
23
3x + 8 = 23 Subtract 8 from both sides: 3x = 15 Divide both sides by 3: x = 5
15
7
23
-6 -15 = -21
You can either calculate 15% of 34.00, which is 34.00*15/100 = 5.10 and subtract that from 34.00 to give 28.90 or you can subtract 15% from 100% = 85% and calculate 85% of 34.00, which is 34.00*85/100 = 28.90.