Room escape contest 2 level 43 (passcode 251735 details in description)
The paper with square and plus sign: the sum of numbers (square) : 1+2+3+4+6+7+8+9=40
Sum the numbers (plus): 4+5+6+2+8=25
So x=1+5+9+3+7=25
Y=1+5+8+3=17
Z=1+2+3+5+7+8+9=35
The paper with square and plus sign: the sum of numbers (square) : 1+2+3+4+6+7+8+9=40
Sum the numbers (plus): 4+5+6+2+8=25
So x=1+5+9+3+7=25
Y=1+5+8+3=17
Z=1+2+3+5+7+8+9=35