Answer:
24 pounds.
Step-by-step explanation:
Barry's bike: \(B\)
Andy's bike: \(A\)
According to the problem:
\(B=6+A\); because Barry's weighs 6 pounds more.
And:
\(B+A=42\); because together they weigh 42 pounds.
So, replacing the first equation into the second expression, we have:
\((6+A)+A=42\\6+2A=42\\2A=42-6\\A=\frac{36}{2}=18\)
Andy's bike weighs 18 pounds.
Therefore, Barry's bike would weigh:
\(B=6+18=24 \ pounds\)
