Question 1172943
Daughter's age = d
Mother's age = 3d + 12
<pr>
(d) + (3d + 12) = 36
<pr>
d + 3d + 12 = 36
<pr>
4d + 12 = 36
<pr>
4d = 24
<pr>
d = 6
<pr>
Daughter's age = d = <b>6</b>
Mother's age = 3d + 12 = 3(6) + 12 = 18 + 12 = <b>30</b>