Lesson 12-2 Check Your Understanding ACTIVITY 12

Lesson 12-2
Solutions of Equations
ACTIVITY 12
continued
My Notes
Check Your Understanding
Use this set of possible solutions to determine a solution to each equation
using substitution.
{3, 8, 10, 14, 15, 16}
3. 4 = 0.5z − 4
4. 11 = x − 3
5. 63 = 21
x
6. 21 + a = 29
y
7. + 1 = 6
3
8. 8x − 2 = 78
LESSON 12-2 PRACTICE
Use this set of possible solutions to determine a solution to each equation
using substitution.
{1, 2, 5, 6, 12, 20}
9. 13x = 26
10. 6x + 9 = 45
14. x2 + 3 = 4
15. Attend to precision. In Lesson 12-1, Item 8, you wrote an equation
for this situation: Brynn needs to save $125 to build a doghouse for
her new puppy. She has saved $68. How much more does she need to
save? Now use this set of possible solutions and substitution to solve
the equation.
{$193, $67, $57, $125}
154 Unit 3 • Expressions and Equations
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11. 3a − 12 = 48
y
12.
−2 =1
4
13. 4 = z − 1