Mr.Tanaka is 35 years old, and his son is 5. In how many years will Mr. Tanaka be three times as old as his son?

Question

zepdrix · Answer

In some unknown number of years, Mr Tanaka will be $\large 35+x$ years old.
When the same amount of years have passed, the son will be $\large 5+x$ years old.

If Mr Tanaka is 3 times as old as the son when these years have passed, we can write it like this,$$\large 35+x=3(5+x)$$From here we can solve for X, the number of years that have passed by.

anonymous · Answer

but whats the answer?

zepdrix · Answer

To solve for x, first, distribute the 3 to each term inside the brackets,$$\large 35+x=15+3x$$

Then subtract x from each side,$$\large 35=15+2x$$Then subtract 15 from each side,$$\large 20=2x$$Then finally divide both sides by 2.
This will tell us the number of years that need to pass in order for the Father's age to be 3 times that of the son's.

anonymous · Answer

what is the answer

anonymous · Answer

i don't  understand algebra so that's why i came on here

zepdrix · Answer

That's not the purpose of this website I'm afraid - to just give you answers :(

I showed you the entire process. If you're still struggling with it maybe you should get a tutor.. or study more :c

Look over the steps. It's a bit of a tricky problem, I know.

anonymous · Answer

blah