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Phổ biến Word Problems >

mother is twice as old as her daughter now,:but 10 years ago, she was 3 times as old as her:daughter. Find their ages at present.

Lời Giải

mother is twice as old as her daughter now, :but 10 years ago, she was 3 times as old as her:daughter. Find their ages at present.

Lời Giải

Daughter^{'} s age is : 20

Mother^{'} s age is : 40

Các bước giải pháp

Translate the problem into an equation:

2 x - 10 = 3 (x - 10)

Giải

x, 2 x - 10 = 3 (x - 10) : x = 20

Tìm age

Daughter^{'} s age is : 20

Mother^{'} s age is : 40

Ví dụ phổ biến

giải cho The sum of 3 times a number and 5 is equal to 9.Darrell opened a savings account and deposited 600.00 as principal. The account earns 13% interest, compounded annually. What is the balance after 7 years?Madelyn opened a savings account and deposited 2,000.00 as principal. The account earns 3% interest, compounded quarterly. What is the balance after 5 years?the sum of two consecutive odd integers is-120 Diane is saving up money to buy a car. Diane puts 9,308.00 into an account which earns 12% interest, compounded quarterly. How much will she have in the account after 4 years?