21 because it is being multiplied
Answer:
2(2x+5)
Step-by-step explanation:
Length of the rectangle=l= 3x
Breadth of the rectangle=b= 5
Perimeter= 2(l+b)
= 2(3x+5)
Answer:
10
Step-by-step explanation:
4 x 10 = 40
40 + 12 = 52
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Divide by 3 on both sides
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