Question

The sum of Pete's and Sam's ages is 30. Five years ago, Pete was 3 times as old as Sam. How old is Sam? Let P = Pete's age, S = Sam's age, and P + S = 30. Which of the following equations would complete the system?

Answer 1

P + S = 30

Five years ago,
Peter's age : (P - 5)

Sam's Age is: (S - 5)

Now,
(P - 5) = 3(S - 5)

P - 5 = 3S - 15

P - 3S = -10

Answer 2

Which of the following equations would complete the system?

Where are the following equations?

Answer 3

S+P=30
P-5=3(S-5) P-5=3S-15 P-3S=-10 Subtract P+S=30

P-3S=-10
-P-S =-30
-----------
-4s=-40
S=10
P=20

Answer 4

whats the answer?

Answer 5

You first give the choices..

Answer 6

A) P-5=3S
B) P-5=3S-5
C) P-5=3S-15

Answer 7

P - 5 = 3S - 15

See my solution did you get this equation there??

Answer 8

Check it in the second last line..

Answer 9

thanks!

Answer 10

Welcome dear..

Answer 11

John is twice as old as Mary. The sum of their ages is 21. How old is Mary? Let J = John's age and M = Mary's age.

Answer 12

J = 2M

J + M = 21

2M + M = 21

3M = 21

Find M from here.

Answer 13

today is not my day, sorry:)

Answer 14

Ha ha ha ha..
Just concentrate..

Answer 15

What you get for M??

Answer 16

i dont even know how to solve this problem.

Answer 17

See John is twice as old as Mary.
Mary is M years old, then John will how many years old??

Answer 18

im looking for the equation that represents the problem.

Answer 19

J = 2M

and the other equation is:

J + M = 21

Answer 20

The sum of two numbers is 44, and the larger number is 2 more than the smaller number. What is the smaller number? If x = the smaller number and y = the larger number, then which of the following systems of equations represents the word problem?