Question 203207
Alex is 8 years younger than his sister. 
His mother is 6 years more than twice of his sister’s age. 
His mother is 42 years old.
Find the ages of Alex and his sister.
:
Let a = Alex's present age
Let s = sister's present age
:
Write an equation for each statement:
"Alex is 8 years younger than his sister."
a = s-8
:
"His mother is 6 years more than twice of his sister’s age. His mother is 42 years old."
2s + 6 = 42
2s = 42 - 6
2s = 36
s = {{{36/2}}}
s = 18 is the sisters age
:
I'll let you find Alex's age
: