SOLUTION: My father is 4 times my age then the sum of our age is 70 what is our age

Question 637338: My father is 4 times my age then the sum of our age is 70 what is our age
Answer by VirtualMathTutor(26) (Show Source): You can put this solution on YOUR website!
First, let your age be 'x' and let your father's age be 'y'
If your father is 4 times your age, then your father y = 4x
If the sum of your ages is 70, then x + y = 70
Now we have two equations with two unknowns x and y
Substitute the first equation y = 4x into the second equation x + y = 70.
This means, in the equation x + y = 70, replace y with 4x:

x + 4x = 70
Simplify the left side to get:
5x = 70
Then divide both sides of the equation by 5:
=
x = 14
Since x + y = 70
We can substitute x = 14 and find y:
14 + y = 70
Subtract 14 from both sides:
14 + y - 14 = 70 - 14
y = 56
Your age is 14 and your dad is 56 years old

You can always check your answer:
Remember the question said, the sum of your ages is 70...
x + y = 70
14 + 56 = 70
You are right!
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