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Exercises Expressions, exponents and radicals

Example 2.37 from Prealgebra, 2.3 Solving Equations Using the Subtraction and Addition Properties of Equality

Solving Equations Using the Subtraction and Addition Properties of Equality: example 2.37

Translate the sentence into an algebraic equation: Twice the difference of $x$ and $3$ gives $18 .$

Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.

Solution

Locate the “equals” word(s).

Recognize the key words: twice; difference of …. and …. Twice means two times.

Translate.

Your turn

The book's Try It right after this example: same idea, new numbers. Only the answer is given.

Translate the given sentence into an algebraic equation:

Twice the difference of $x$ and $5$ gives $30 .$

How did it go?

PreviousSolving Equations Using the Subtraction and Addition Properties of Equality: example 2.36 Next Solving Equations Using the Subtraction and Addition Properties of Equality: example 2.38

From Prealgebra (1st edition) by OpenStax (Rice University), section 2.3, licensed under CC BY 4.0. Original at openstax.org. We split the solution into steps; the words, numbers and figures are the book's. OpenStax doesn't endorse this site.