1) (x+15) + (y-8) = x + 15 + y - 8 = x + y + 7 = 35 + 7 = 42
2) (x:5) (y:2) = (60/5) (60/2) = 12 * 30 = 360
3) x:(y3) = x/(y3) = 12/(12*3) = 1/3
4) (x2):y = (102):10 = 20:10 = 2
1) (x+15) + (y-8) = x + 15 + y - 8 = x + y + 7 = 35 + 7 = 42
2) (x:5) (y:2) = (60/5) (60/2) = 12 * 30 = 360
3) x:(y3) = x/(y3) = 12/(12*3) = 1/3
4) (x2):y = (102):10 = 20:10 = 2