Question #0ff05

1 Answer
Jim G.
Dec 12, 2016

8" and " 13" inches"8 and 13 inches

Explanation:

If we let x, be the length of the second part, then.

the length of the first part is x + 5

The 2 parts must total to 21

rArrx+5+x=21rArr2x+5=21⇒x+5+x=21⇒2x+5=21

subtract 5 from both sides of the equation.

2xcancel(+5)cancel(-5)=21-5

rArr2x=16

To solve for x, divide both sides by 2

(cancel(2) x)/cancel(2)=16/2

rArrx=8

rArr"first part " =x+5=8+5=13" inches"

"and second part " =x=8" inches"

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