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"the perimeter of a rectangle is 42 centimeters. the length of the rectangle can be represented by (x+4), and the width can be represented by (2x-7). what are the dimensions of this rectangle in centimeters"

Sagot :

L=12. W=9 42=2{(x+4)+(2x-7)} divide by 2 21=3x-3 add 3 24=3x divide by 3 8=x L=8+4=12 W=2*8-7=9
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