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Popolare Word Problems >

six years ago mark was four times as old as billy. In 4 years mark will be twice as old as billy how old are they now

Soluzione

s i x ye a rs a g o ma r k w a s f o u r t im es a s o l d a s bi ll y . I n 4 ye a rs ma r k w i ll b e tw i ce a s o l d a s bi ll y h o w o l d a re t h ey n o w

Soluzione

Mark^{'} s age is : 26

Billy^{'} s age is : 11

Fasi della soluzione

Translate the problem into an equation:

x - 6 = 4 (y - 6), x + 4 = 2 (y + 4)

x - 6 = 4 (y - 6), x + 4 = 2 (y + 4) : x = 26, y = 11

Mark^{'} s age is : 26

Billy^{'} s age is : 11

Esempi popolari

The radius of a cerchio is 14 ft. Find its area in terms of pipi.Six more than half of a number is less than or equal to-4 A number squared and subtracted from 5.Toby opened a savings account and deposited 800.00 as principal. The account earns 7% interest, compounded monthly. What is the balance after 6 years?Heather invests 4,900 in an account with a 3.5% interest rate, making no other deposits or withdrawals. What will Heather’s account balance be after 5 years if the interest is compounded 2 times each year?