It is not intuitive to operate with "opening" and "heart", so I assume that opening is X and heart is Y, then:

Because y 2 = 10 * x+y 1,

X+Y=7②

Substituting ② into ① gives y 2 =10 (7-y)+y.

Y^2=70-9Y

Y=5 or Y=- 14 (irrelevant)

Because y = 5 and x+y = 7, X=2.

Conclusion: Open =2, Heart =5.