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Exercises Numbers, fractions and percents

Example 5.48 from Prealgebra, 5.4 Solve Equations with Decimals

Solve Equations with Decimals: example 5.48

Translate and solve: The sum of $−1.2$ and $2.9$ is $1.7 .$

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

Translate.

Subtract $2.9$ from each side.

Simplify.

Check: Is the sum $n$ and $2.9$ equal to $1.7$ ?

Let $n = −1.2 :$ Is the sum $−1.2$ and $2.9$ equal to $1.7$ ?

Translate.

Simplify.

Your turn

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

Translate and solve: The sum of $j$ and $3.8$ is $2.6 .$

How did it go?

PreviousSolve Equations with Decimals: example 5.47 Next Averages and Probability: example 5.49

From Prealgebra (1st edition) by OpenStax (Rice University), section 5.4, 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.