The sum of the present ages of the mother and her daughter is 80 years. The mother was thrice as old as her daughter when she was as old as her daughter is now, Find
the present ages of the mother and her daughter.​

20 and 60

Step-by-step explanation:

80= 3x + x

80= 4x

x=20

Daughters Age = x = 20

Mothers Age = 3x = 3(20)

=60

mother=60

daughter=20

Step-by-step explanation:

present age is 80

mother is thrice as old as her daughter when she was as old as her daughter is now

i.e 3x

then daughter is x

so 3x + x =80

4x =80

4x/4=80/4

then you cancel out with 4

therefore x is 20

mother=3x

3×20=60

then daughter=20

it is probably the graph on the bottom right.