onelisabeast13 onelisabeast13
  • 15-11-2021
  • Mathematics
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u
Write an algebraic expression for the verbal expression twice the sum of a number and 7.

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spercyboyjk
spercyboyjk spercyboyjk
  • 16-11-2021

Answer:

14

Step-by-step explanation:

Okay, so you need to create an equation which shows that twice the sum of a number (n) and 7 is 3 times that number. So you need twice the sum of n + 7 and that will equal 3 times n.

2(n + 7) = 3n

Now, multiply

2n + 14 = 3n

2n + 14 -2n = 3n - 2n

14 = n

So the number is 14. Now you can check your answer

2(14 + 7) = 3(14)

2x21 = 42

42 = 42

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