Solve the linear system of equations using the linear combination method. 8a−4b=20
5a−8b=62
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a =
b =

Can anyone me with 32,33,36,37,and 40.

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?

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