....................................3.....................................
Perimeter of rectangle:2(length+width):2(13+7)=40
Perimeter of square:4(length of one side):4(x)=40
X=10
Answer:
Step-by-step explanation:

2(3x +x)=30
8x = 30
x =3.75 = width
3x = 11.25 = length
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