Lungelo has a son, Matthew. Here are some facts about how old Lungelo and Matthew are:Lungelo is 5 times as old as Matthew right now.10 years from now, Lungelo will be 3 times as old as Matthew.How old are Lungelo and Matthew now?

解

Lu n g e l o ha s a so n, M a tt h e w . Here a re so m e f a c t s ab o u t h o w o l d Lu n g e l o an d M a tt h e w a re : Lu n g e l o i s 5 t im es a s o l d a s M a tt h e w r i g h t n o w .10 ye a rs f ro m n o w, Lu n g e l o w i ll b e 3 t im es a s o l d a s M a tt h e w . Ho w o l d a re Lu n g e l o an d M a tt h e w n o w ?

Matthew^{'} s age is : 10

Lungelo^{'} s age is : 50

解答ステップ

Translate the problem into an equation:

5 x + 10 = 3 (x + 10)

x

を解く

5 x + 10 = 3 (x + 10) : x = 10

発見する age

Matthew^{'} s age is : 10

Lungelo^{'} s age is : 50