Math

QuestionJohn is 4 years older than Mary. Their ages total 30. How old is each? a. 13 b. 14 c. 17

Studdy Solution

STEP 1

Question: How can we represent John's age if we assume Mary's age is x?
A) x + 1 B) x + 4 C) x - 4 D) 2x
Answer: B) x + 4

STEP 2

Question: How can we write an equation representing the sum of John and Mary's ages?
A) x + (x + 4) = 30 B) 2x + 4 = 30 C) x - 4 = 30 D) x + x = 30
Answer: A) x + (x + 4) = 30

STEP 3

Question: How can we simplify the equation x + (x + 4) = 30?
A) 2x + 4 = 30 B) 2x - 4 = 30 C) x = 26 D) x = 34
Answer: A) 2x + 4 = 30

STEP 4

Question: What is the value of x when 2x + 4 = 30?
A) 13 B) 14 C) 15 D) 16
Answer: A) 13

STEP 5

Question: If Mary is 13 years old, how old is John?
A) 13 B) 14 C) 17 D) 18
Answer: C) 17

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