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3 years ago

Gary is 25 years old. That is 7 more than

Mathematics

1 answer:

SpyIntel [72]3 years ago

5 0

Answer:

2x + 7 = 25

x = 7

Step-by-step explanation:

Gary: 25

Sean: x

----------------------------

Let's break down the sentence into mathematical terms

Gary is 25 years old. That is 7 more than twice Sean's age.

In math, is means equal to. It is represented with an equal sign (=)

Gary = 25. 25 = 7 more than twice Sean's age.

7 more is represented by 7 +

Gary = 25. 25 = 7 + than twice Sean's age.

Twice means double which is 2 ·

Gary = 25. 25 = 7 + 2 · Sean's Age

Sean's Age will be represented by x

Gary = 25. 25 = 7 + 2x

We don't need it to say "Gary = 25" in our equation.

25 = 7 + 2x

Let's rewrite it with the associative property.

2x + 7 = 25

---------------------

Now, solve

2x + 7 = 25

-7 -7

2x = 18

÷2 ÷2

x = 7

----------------------

Sean is 7 years old.

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