Big Ideas Math: Modeling Real Life, Grade 6
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Big Ideas Math: Modeling Real Life, Grade 6 View details
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Exercise 13 Page 276

The word is divides the sentence into what should be on the left-hand side and what should be on the right-hand side of the equation.

Equation: x+5=9
Solution: x=4

Practice makes perfect

We have been given a sentence and we need to translate it into an equation.

5 more than a number x is 9.

Every equation has an equals sign and values or expressions on either side of it. Key phrases, such as is, is equal to, and equals tell us about the placement of the equals sign.

5more than a numberx is 9. ⇕ 5more than a numberx = 9. On the left-hand side we have one key word: more than. This words tell us the operation that will be used in our equation. More than indicates addition. 5 more than a numberx x + 5 On the right-hand side, we have the number 9. Putting these sides together, we have a complete equation. x + 5 = 9

Solving the Equation

Finally, we can solve the equation using the Properties of Equality.
x+5=9
x+5-5=9-5
x=4