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12 votes
I couldn’t figure this probably out. Please help

I couldn’t figure this probably out. Please help-example-1

2 Answers

9 votes

Answer:

Formula = (l + b) x 2= 42 so answer = x=9

Explanation:

l =x

b =x+3

( x+x+3) * 2 =42

2x +3 x 2 = 42

2x +3 = 42/2

2x +3 = 21

2x = 21 - 3 =18

x = 18/2

x=9

User Samssonart
by
4.2k points
6 votes

Answer:

x = 9

Explanation:

Perimeter of rectangle = 2(l+b) = 42

=> 2(x+3 + x)

=> 2 (2x + 3) = 42

=> 4x + 6 = 42

=> 4x = 42 - 6

=> 4x = 36

=> x = 36/4

=> x = 9

Hope it helps :)

User Prasad Vsv
by
3.5k points