Page 597 - Basic College Mathematics with Early Integers

Vocabulary and Readiness Check

Use the choices below to fill in each blank.

equation addition simplifying
solving equivalent expression

1. The equations x + 6 = 10 and x + 6 - 6 = 10 - 6 are called equations.
2. The difference between an equation and an expression is that a(n) contains an equal sign, while a(n)
does not.
3. The process of writing -3x + 10x as 7x is called the expression.
4. For the equation x - 1 =-21 , the process of finding that -20 is the solution is called the equation.
5. By the property of equality, x =-2 and x + 7 =-2 + 7 are equivalent equations.

8.2 Exercise Set FOR EXTRA HELP

Objective Decide whether the given number is a solution of the given equation. See Examples 1 and 2.

1. Is 10 a solution of x - 8 = 2? 2. Is 9 a solution of y - 2 = 7?

3. Is -5 a solution of x + 12 = 17? 4. Is -7 a solution of a + 23 =-16?

5. Is -8 a solution of -9f = 64 - f? 6. Is -6 a solution of -3k = 12 - k?

7. Is 3 a solution of 51c - 52 =-10? 8. Is 2 a solution of 21b - 32 = 10?

Objective Solve. Check each solution. See Examples 3 through 7.

9. a + 5 = 23 10. f + 4 =-6 11. d - 9 =-17

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12. s - 7 = 15 13. 7 = y - 2 14. 1 = y + 7

1 7
15. -12 = x + 4 16. -10 = z - 15 17. x + =
2 2
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