89
72 + 72 = 144
60 + 12 = 72
300 !
49 + 72 + 68 = 189
72+30=102
180+72=252
You would formulate this problem X/100 * 150 = 72 and solve for X.
There are 60 minutes per hour: 72 x 60 = 4,320 minutes.
72 !
72
2t - 12 - 3t = 60 -1t - 12 = 60 -1t -12 +12 = 60 + 12 -1t = 72 t = -72