Posted by Hassan on .
Rodney is three times as old as his sister. Ayear ago he was four times as old. How old are rodney and his sister now?

4th grade math 
bobpursley,
R=3S
R1=4(S1)
Does that help? 
4th grade math 
Writeacher,
3 x 3 = 9
2 x 4 = 8