Question

小红今年10岁,他爸爸今年36,小红多少岁时,爸爸的年龄是她的3倍?

Answer 1

a.(36-10)/(3-1)

b.(40-12)/(3-1)-12

c.21-(49-21)/(5-1)

d.(74-14)/(5-1)*7

e.(66-10)/(5-1)-10

f.红:(23+2*2)/(2+1)

丽:(23+2*2)/(2+1)*2

g.红：(5+5)/(3-1)

刚：(5+5)/(3-1)*3