Amy is 9 years older than her brother john. their combined age is 23. write an expression to represent johns age (use x)

Question

Mathematics

Nathalia Salinas

8 March, 08:10

Amy is 9 years older than her brother john. their combined age is 23. write an expression to represent johns age (use x)

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Answers (1)

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Garrett Holder · Answer 1

Let x the age of John

Amy's age = x + 9

from question, we get,

John's age + Amy's age = 23

x + (x+9) = 23

=> x + x + 9 = 23

=> 2x = 23 - 9

=> x = 14/2

=> x = 7