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2 years ago

Devaughn is 7 years older than Sydney. The sum of their ages is 95. What is Sydney's age?

Mathematics

1 answer:

pishuonlain [190]2 years ago

4 0

Answer:

Step-by-step explanation:

Let's say that Devaughn's age is D, and Sydney's age is S.

We know that D is 7 greater than S, so D = 7 + S.

We know that the sum of their ages, or D + S, is equal to 95, so D+S = 95

We have

D = 7 + S

D + S = 95

What we can do is plug D= 7 + S into the second equation to get

D + S = 95

= (7+ S) + S

= 7 + 2 * S

7+2 * S - 95

subtract 7 from both sides to isolate the coefficient and the variable

2 * S = 88

divide both sides by 2 to isolate the variable

S = 44

Sydney is therefore 44 years old

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Devaughn is 7 years older than Sydney. The sum of their ages is 95. What is Sydney's age?​

Devaughn is 7 years older than Sydney. The sum of their ages is 95. What is Sydney's age?