The sum of the ages of a Juan and Pedro is 49 years. The difference between their ages is 21 years. What are their ages?
Represent their ages using variables.
Write an equation representing the sum of their ages.
Write an equation representing the difference between their ages.
Solve the system formed by the two equations.
Represent their ages using variables.
Write an equation representing the sum of their ages.
Write an equation representing the difference between their ages.
Solve the system formed by the two equations.
Answers & Comments
Either of pedro and juan has the age of
(35 yrs.old and 14 yrs. old)
Step-by-step explanation:
x(juan)+ y(pedro)= 49
x(juan) - y(pedro)= 21
x+y= 49
23+22= 49
23-22=1
therefore juan and pedro's age was not 23 and 22. Lets try another two numbers that the sum and difference was 49 and 21.
x+y =49
35+14= 49
x-y= 21
35-14= 21
We derive the sum and difference of the ages
therefore, 35 and 14 yrs.old was the probabikty of the ages of two