Question

Mary is twice older than her sister in 5 years time, she will be 2 years older than her sister Find how old and they both now

Answer 1

Answer:

2 & 4 year

Step-by-step explanation:

M = 2S

M+5 = S +5 +2

M = S + 2

S +2 = 2S

S = 2

M = 4

Answer 2

Answer:

$lets \: the \: age \: of \: marys \: sister \: = \: x \: says \: \\ marys \: age \: = 2 \times x = 2x \\ after \: 5 \: years \: her \: sisters \: age \: \\ = (x + 5)years \\ = (2x + 5)years \\ after \: 5 \: years \: marys \: age \: \\ according \: to \: the \: sum \\ 2x + 5 = (x + 5) \: + 2 \\ 2x - x = 5 + 2 - 5 \: \: \: \: \: x = 2 \\ there \: fore \: the \:age \: of \: mary \: s \: sister \: = x = 2 \: years \\ marys \: age = 2x = 2 \times 2 = 4 \: yesrs$