Answer:
Length = 10 cm
Width = 10-2 = 8 cm
Step-by-step explanation:
Area formula (L)(W)
80 = 10(x-2)
80 = 10x - 20
Add 20 to both side
100 = 10x
x= 10
3 x 9 = 27
1 * 9 = 9
2 * 9 = 18
3 * 9 = 27
she can take 20 because 6c3=20
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