Question

Al can paint a room in a hours working alone. Bill can paint a room in b hours working alone. Working alone, Bill takes tow more hours to paint a room than Al. Working together, they can paint a room in 8 hours. Write down a system of two equations involving the variables a and b that can be used to find a and b. Solve the system.

b=a+2
a+b=8
substitute and solve

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