Question

a/2+a/2+a/8=21
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Answer 1

It is your answer..........

Answer 2

Answer:

a=18.667

Step-by-step explanation:

a/2 +a/2 +a/8 =21

LCM of 2 & 8 = 8

⇒ 4a/8 + 4a/8 +a/8 =21

⇒ (4a+4a+a)/8=21

⇒9a/8=21

⇒a=(21*8)/9

⇒a=18.667