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Exercises Equations and inequalities

Example 8.5 from Prealgebra, 8.1 Solve Equations Using the Subtraction and Addition Properties of Equality

Solve Equations Using the Subtraction and Addition Properties of Equality: example 8.5

Solve $a - 3.7 = 4.3 .$

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

Use the Addition Property of Equality.

Add.

Check:

Substitute $a = 8$ .

Simplify.

The solution checks.

Your turn

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

Solve: $b - 2.8 = 3.6 .$

How did it go?

PreviousSolve Equations Using the Subtraction and Addition Properties of Equality: example 8.4 Next Solve Equations Using the Subtraction and Addition Properties of Equality: example 8.6

From Prealgebra (1st edition) by OpenStax (Rice University), section 8.1, 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.