@SamadSpeak A+A=12
so 2A=12โA=62A = 12 \Rightarrow A = 62A=12โA=6
B+B=6B + B = 6B+B=6
so 2B=6โB=32B = 6 \Rightarrow B = 32B=6โB=3
Now solve:
A+Bร2A + B \times 2A+Bร2
Using order of operations (multiply first):
6+(3ร2)6 + (3 \times 2)6+(3ร2) 6+6=126 + 6 = 126+6=12