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Phổ biến Word Problems >

In twenty years, Jon's age would be thrice his age four years ago. How old will Jon be in two years?

Lời Giải

I n tw e n t y ye a rs, J o n^{'} s a g e w o u l d b e t h r i ce hi s a g e f o u r ye a rs a g o . Ho w o l d w i ll J o n b e in tw o ye a rs ?

Lời Giải

Jo n^{'} s age in 2 years : 18

Các bước giải pháp

Translate the problem into an equation:

x + 20 = 3 (x - 4)

Giải

x, x + 20 = 3 (x - 4) : x = 16

Tìm Jon's age in 2 years:

18

Jo n^{'} s age in 2 years : 18

Ví dụ phổ biến

which number shows that the decimal expansion 13/33 The hiệu of the square root of a number and the number cubed Tammy deposited 20 in an account earning 10% interest compounded annually.To the nearest cent, how much interest will she earn in 3 years?four times a number plus fifteen is 63.The sum of two numbers is 22 . If the sum of their reciprocals is 11/60 find the numbers.