Question #8183c

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Answer 1 · 2017-04-29T17:41:23

Width#color(blue)(=3x+1#

#2L+2W=#Perimeter of a rectangle

#:.2L+2W)=6x^2+10x+2# given

#:.2(L+W)=2(3x^2+5x+1)#

#:.L+W=(2(3x^2+5x+1))/2#

#:.L+W=3x^2+5x+1#

#:.(L+W)-L=W#

#:.L=3x^2+2x# given

#:.W=3x^2+5x+1-(3x^2+2x)#

#:.W=3x^2+5x+1-3x^2-2x#

#:.W=5x-2x+1#

#:.color(blue)(W=3x+1#