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24-10-2021
Mathematics

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The sum of a number and seven more than the number is 43. What is the number?

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24-10-2021

Answer:

18

Step-by-step explanation:

we can use the variable x to represent the number since it's currently unknown

seven more than the number can be represented as x + 7
we can find the sum of both by adding them

x + x + 7 = 43

2x + 7 = 43

-7 -7

2x = 36

we divide by 2 on both sides to isolate x

x = 18

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