Question

the sum of twice a number and six is eighteen, fine the number.​

Answer 1

What is the number, if the sum of twice a number and half the number is 10?

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Jim Simpson

Answered September 8, 2017

What is the number, if the sum of twice a number and half the number is 10?

Let x be the unknown number.

2x + x/2 = 10 Given

2(2x) + 2(x/2) = 2(10) Multiply both side by 2

4x + x = 20 Multiplication

5x = 20 Combine like terms

(5x)/5 = (20)/5 Divide both sides by 5

x = 4

Check:

2x + x/2 = 10 Given

2(4) +(4)/2 = 10 ? Substitute 4 for x

8 + 2 = 10 ? Multiplication and Division

10 = 10 Addition

Answer: The number is 4 if the sum of twice the number and half the number is 10.

Answer 2

Answer:

Let the number be x

then,

2x + 6 = 18

2x = 18 - 6

x = 12/2

x = 6.

Hence the number is 6.

Step-by-step explanation:

Hope it helps.