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What is the best reason for jacinta to have a savings account in addition to a checking account

Leo has b boxes of pencils. each box contains 6 pencils. he has a total of 42 pencils. the equation that represents this situation the value of b that makes the equation true the first one is b+6=42,6b=42,b=42+6,or 42b=6 the second one are 7,836 48

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length