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Phổ biến Word Problems >

kara is 5 years older than her her brother ben. if the sum of their ages is 21 how old is ben?

Lời Giải

ka r a i s 5 ye a rs o l d er t han h er h er b ro t h er b e n . i f t h e s u m o f t h e i r a g es i s 21 h o w o l d i s b e n ?

Lời Giải

Ben^{'} s age is : 8

Các bước giải pháp

Translate the problem into an equation:

x + x - 5 = 21

Giải

x, x + x - 5 = 21 : x = 13

Tìm Ben's age

: 8

Ben^{'} s age is : 8

Ví dụ phổ biến

the number increased by-2 some number plus 5 is equal to the quotient of the number and 11 One number is 2/3 of another number. The sum of the two numbers is 40. Find the two numbers Stefan is saving up money to buy a car. Stefan puts 5,813.00 into an account which earns 8.82% interest, compounded monthly. How much will he have in the account after 5 years?Scott and Brittany deposit 8,000.00 into a savings account which earns 9% interest compounded quarterly. They want to use the money in the account to go on a trip in 3 years. How much will they be able to spend?