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Phổ biến Word Problems >

Maria is 7 years older than her brother Robert. In 2 years, Maria's age will be 4 times Robert's age 3 years ago. Find their present ages.

Lời Giải

M a r ia i s 7 ye a rs o l d er t han h er b ro t h er R o b er t . I n 2 ye a rs, M a r i a^{'} s a g e w i ll b e 4 t im es R o b er t^{'} s a g e 3 ye a rs a g o . F in d t h e i r p rese n t a g es .

Lời Giải

Maria^{'} s age is : 14

Robert^{'} s age is : 7

Các bước giải pháp

Translate the problem into an equation:

x + 2 = 4 (x - 7 - 3)

Giải

x, x + 2 = 4 (x - 7 - 3) : x = 14

Tìm age

Maria^{'} s age is : 14

Robert^{'} s age is : 7

Ví dụ phổ biến

48 less than twice a number The sum of 4 times a number and 2 equals 6 What number is 128% of 75?The square of a number is 4 times the number. Find the number Nicholas has 5,495 in an account that earns 14% interest compounded annually.To the nearest cent, how much interest will he earn in 4 years?