Answer:
8 years and 32 years old
Explanation:
Let x be the age of the mother now and y be the age of the daughter now then...
x=4y
4+x=3(y+4)
Note that in the second equation we are adding 4 because it says "in four years"
Simplify the second equation to get:
4+x=3(y)+3(4)
4+x=3y+12
Subtract 4 from both sides
x=3y+8
Solve using substitution (substitute 4y for x)
4y=3y+8
Subtract 3y from both sides
y=8
x=4(8)=32
The mother is 32 years old and her daughter is 8 years old