Its Challenge..Red, Yellow, Blue, Green Heart Puzzle

Its Challenge .. if ..
Red Heart + Yellow Heart = 21
Blue Heart + Green Heart = 195
Yellow Heart + Blue Heart = 105
Green Heart + Red Heart = 39
Yellow Heart + Green Heart = 91
Blue Heart + Red Heart = 45
Then..
Red Heart + Yellow Heart + Blue Heart + Green Heart = ?????

Copy between the lines to copy in whatsap
----------------------------------------------
Its challange..?
If...
?�?=21
?�?=195
?�?=105
?�?=39
?�?=91
?�?=45
Then..
?+?+?+?=?????
----------------------------------------------

Click here for Answer

3x7=21
15x13=195
7x15=105
13x3=39
7x13=91
15x3=45
so 3+7+15+13=38