a girl is 3 years older than her brother. in four more years, 3 time her age will be 4 times her brother's age find their present age
Answers
Answered by
3
Step-by-step explanation:
x+3= y. ......1
(y+3)4 = (x+4)3
4y + 12= 3x+12
3x-4y = 0. 2
by one and two
3x-3y+9=0
3x-4y. =
y =9
x=12
Answered by
1
Answer:
12
Step-by-step explanation:
x+3= y. ......1
(y+3)4 = (x+4)3
4y + 12= 3x+12
3x-4y = 0. 2
by one and two
3x-3y+9=0
3x-4y. =
y =9
x=12
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