hello

perimeter = 2( length + width)

42 = 2 (x+4 +2x-7)

42 = 2( 3x -3 )

42/2 = 3x-3

21 = 3x-3

21+3= 3x

24 = 3x

x = 24/3

x= 8..

length = x+4 = 8+4 = 12................................answer

width = 2x-7 = 2*8 - 7 =9..............................answer

answer is

J.length= 12 and width = 9

why did you divide by 2 instead of distributing the 2 to the 3x-3

you can do that also ,

answer will be same

i will show you

42 = 2*3x - 2*3

42 = 6x - 6

42+6 =6x

48 = 6x

x = 48/6

x = 8

this is the same answer i got before , x=8

Ohhh thank you

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