Solving Addition/Subtract Solving Addition/Subtract Inequalities Inequalities

SWBAT solve one step inequalities by SWBAT solve one step inequalities by applying the Addition and Subtraction applying the Addition and Subtraction

Properties of Inequality; graph the Properties of Inequality; graph the solution set of an inequalitysolution set of an inequality

Set up the problemSet up the problem

Eddie’s little brother has been saving only Eddie’s little brother has been saving only dollar bills in a piggy bank. On Monday, dollar bills in a piggy bank. On Monday, after he put $12 in his piggy bank, there after he put $12 in his piggy bank, there was at least $33 in it. How much money was at least $33 in it. How much money was in Eddie’s little brother’s piggy bank was in Eddie’s little brother’s piggy bank before Monday?before Monday?

Dollars before plus dollars Dollars before plus dollars is at totalis at total

Monday Monday added least added leastx + $12 ≥ $33

x + $12 x + $12 ≥ $33≥ $33

What operation is being done? What is What operation is being done? What is the inverse operation?the inverse operation?

What is the next step after you have What is the next step after you have solved an equation?solved an equation?

How can you check it?How can you check it?

ExamplesExamples

n + 4 n + 4 ≤ 10≤ 10

n + 8 ≥ 14n + 8 ≥ 14

4 < n – 94 < n – 9

d + (-3) > 2d + (-3) > 2

t + 24 > 36t + 24 > 36

12 > x + 512 > x + 5

Try the problems on your paperTry the problems on your paper

X ≥ -7X ≥ -7

-5 > k-5 > k

x < 7x < 7

t > 32 t > 32 732