Question

Chapter-6 Linear equations in one variable. John is 7 years older than his sister and the sum of their ages is 21 years. Find their ages.​

Answer 1

Answer:

sister=7 yrs brother=14yrs

Step-by-step explanation:

let his sisters age be x

brother would be x+7

sisters age+brothers age=21

x+x+7=21 (as sum of both the ages is 21)

2x=21-7

2x=14

x=7

so the sister is 7 years old and the brother is 7+7=14 years old

Answer 2

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