300
In one store in the afternoon sold twice more pears, than in the morning. During the whole day they sold 360 kg. pears. How many kilograms of pears are sold in the morning and how many in the afternoon?
Lets take that the sold in the morning pears are x kg, then in the afternoon are sold 2x kg. Their sum x + 2x = 3x kg is the whole quantity sold pears, 360 kg. So we get the following equation
3x = 360 <=> x = 360/3 <=> x = 120
Therefore in the morning they sold 120 kg pears, and in the afternoon 2.120 = 240 kg.