Question

Tom has twice as many marbles as luke. together they have 39 marbles. how many marbles does tom have?

Answer 1

Tom has 26 marbles total. 

Answer 2

L = luke T = Tom

2L = T
T + L = 39
2L + L = 39
3L = 39
L = 13

2L = T
2(13) = T
26 = T

Tom has 26 marbles.