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1.) Seven less than twice
Seven less than twice a number is 15.
What is the number?
2.)Twice a Number reduced by 5 equals the number.Find the Number
3.)Thrice the sum of a number and 5 is 18.What is twice the number
4.)Princess Weight?s half as much as her father,who weigh 86kg.How many does princess weight​


Sagot :

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1.) Seven less than twice a number is 15. What is the number?

Equation: 2x - 7 = 15

  • 2x = 15 + 7
  • 2x = 22
  • 2x/2 = 22/2
  • x = 11

Checking: 2x - 7 = 15 ⇆ Equation

  • 2x - 7 = 15
  • 2(11) ⇒ 2 × 11 = 22
  • 22 - 7 = 15

ANSWER: x = 11

 

2.) Twice a number reduced by 5 equals the number. Find the number.

Equation: 2x - 5 = x

  • 2x - 5 = x
  • 2(5) ⇒ 2 × 5 = 10
  • 10 - 5 = 5

ANSWER: x = 5

3.) Thrice the sum of a number and 5 is 18. What is twice the number?

Equation: 3 (n + 5) = 18

  • (3n + 5) - 15 = 18 - 15
  • 3n/3 = 3/3
  • 2n = 2

ANSWER: 2

4.) Princess weighs half as much as her father, who weighs 86kg. How much does Princess weigh?

Equation: w = 86/2

  • 86/2 ⇒ 86 ÷ 2 = 43

ANSWER: 43kg

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