-7
15
8 and 5/15 - 3 and 8/15 = 4 and 12/15 = 4 and 4/5
1/5 - 8/15= 1x3/5x3 - 8/15= 3/15 - 8/15= (3 - 8)/15= -5/15= -5÷5/15÷5= -1/3
13
60 -15 = 45
8
8
15
8 and 5/15 - 3 and 8/15 = 4 and 12/15 = 4 and 4/5
34/8 - 49/8 = -15/8 or -1 and 7/8
1/5 - 8/15= 1x3/5x3 - 8/15= 3/15 - 8/15= (3 - 8)/15= -5/15= -5÷5/15÷5= -1/3
13
60 -15 = 45
Each number is 15 subtracted from the preceding number.
-3
136 subtracted by 128 = 8
8n - 15 = 57 (add 15 to both sides)8n - 15 + 15 = 57 + 158n = 72 (divide both sides by 8)8n/8 = 72/8n = 9