2007-01-24 11:01:09 · 9 answers · asked by mirrorcoin 3 in Education & Reference ➔ Homework Help
Sara's current age = x
John's currect age = x + 10
Sara's age in 4 years = x + 4
John's age in 4 years = x + 10 + 4 = x + 14
John's age in in 4 years = 2(Sara's age in 4 years)
x + 14 = 2(x + 4)
Distribute the 2.
x + 14 = 2x + 8
Subtract x from both sides.
14 = x + 8
Subtract 8 from both sides.
6 = x.
Sara is 6, and John is 16.
In four years Sara will 10 and John will be 20...twice Sara's age.
2007-01-24 11:11:50 · answer #1 · answered by mirramai 3 · 0⤊ 0⤋
Sara's age = S
John's age = S +10
(S +10) + 4 = 2(S +4) Read that equation as John's age in 4 years is equal to twice Sara's age in 4 years.
S + 14 = 2s + 8;
So S = 6, so John's 16.
2007-01-24 19:08:04 · answer #2 · answered by josh c 1 · 1⤊ 0⤋
John is 16 years old
2007-01-24 19:05:50 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Let J equal John's age now and S equal Sara's.
The equation for their current ages is J = 10 +S
The equation for their ages in 4 years is J + 4 = 2S + 8
Isolate J on one side J = 2S + 4
Combine them 2S + 4 = 10 + S
Solve for S S=6
Add ten for John's age 16
2007-01-24 19:12:09 · answer #4 · answered by wolfmankav 3 · 0⤊ 0⤋
So you can see, by looking at the variations in the answers above, that you can't trust the uneducated population of the internet to do your homework for you.
2007-01-24 19:15:38 · answer #5 · answered by z 3 · 0⤊ 1⤋
16 but thats the youngest age this situation could happen in.
2007-01-24 19:06:46 · answer #6 · answered by Krista 5 · 0⤊ 0⤋
The answer is: Not Enough Info
2007-01-24 19:08:03 · answer #7 · answered by Anonymous · 0⤊ 1⤋
there is no indication how old sara is
2007-01-24 19:06:26 · answer #8 · answered by aracely s 1 · 0⤊ 2⤋
maybe he is 14
2007-01-24 19:06:13 · answer #9 · answered by Queen Bee 2 · 0⤊ 1⤋