a)
□+□+□ = 66
□ = 66:3 = 22
□+□+♡ = 56
22+22+♡ = 56
♡ = 56-44
♡ = 12
◇+□+◇ = 38
◇+22+◇ = 38
2◇ = 16
◇ = 16:2 = 8
b)
♡+♡+□ = 32 => 2♡+□ = 32
□+□+◇ = 32 => 2□+◇= 32
◇+◇+♡ = 26 => ♡+2◇ = 26
♡ = 16-1/2□
16-1/2□+2◇ = 26
-□+4◇ = 20 /*2
{-2□+8◇ = 40
{2□+◇= 32
9◇ = 72
◇ = 8
-□ +4*8 = 20
□ = 12
♡ = 16-1/2*12
♡ = 10