3 years ago

A) The sum of −3x+5 and 7−4x is subtracted from 5x+17.

1 answer:

8 0

A. -3x+5+7-4x
-3x-4x+5+7
-7x+12

-7x+12-5x+17
-7x-5x+12+17
-12x+29

B. -5*(x+2)= -5x-10
-6x-1+ (-5x-10)= -6x-5x-1-10=
-11x-11

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the length of a rectangular building is 6 feet less than 3 times t he width. The perimeter is 120 feet. Find the width and the l

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Call the width x. Note that the length is 3x-6. We know that double the width plus double the length is 120, so we write an equation:

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