1. Unit 2: Day 4 – 1 step equations

2. Warm-up Write an equation to model the situation.
The total cost of n cartons of milk is $ Each carton costs $0.45.
Simplify:
2. 6t + 2 – 4t + 5

3. HW Check t=24.95s, t= total cost, s = # of shirts
M = 0.10d, m = amount of money, d=# of dimes
M = 48 – a, m = # of marbles, a = # given away
T = 8p, t = total cost, p = price per ticket
C = 32.95p, c = total cost, p = # of pants

4. 23. T = 7n, t = total cost, n = # of tickets 24
23. T = 7n, t = total cost, n = # of tickets h = D, h = # of hours, D= distance traveled 25. 5h=p, h=# of hours, p = pay d=L, d=# of days, L=length

5. The total cost of n cartons of milk is $3.60. Each carton costs $0.45.
Our equation was: 3.60 = 0.45n How do we find out how many cartons of milk were bought?

6. “Whatever you do to one side you must do to the other!”
Solving Equations!
“Whatever you do to one side you must do to the other!”

7. Vocabulary
Equivalent Equations are equations that have the same solution or (solutions) A solution of the equation is a value (s) that make an equation TRUE
Have students recall what an equivalent expression is.

8. Are the Equations True? 6 + 10 = 8 + 1 + 5 2(8) + 1 = 8 + 2 + 7
2 + x = 1 + x + 1

9. Solving Equations (finding equivalent equations)
Use INVERSE OPERTATIONS : operations that undo each other EX x = 5

10. Inverse Operations:
Operation: Inverse: Addition Subtraction Subtraction Addition Multiplication Division Division Multiplication

11. Create an equivalent Equation:
N – 3 = d + 5 = 7
x = 8

12. 4) A + 6 = ) x – 12 = 24
5) x = ) 15 = a + 4.2

13. Solve
5x = = 2v

16. A mother holds her baby and steps on a scale
A mother holds her baby and steps on a scale. The scale reads 147 pounds, the mother weighs 129 pounds. How much does the baby weigh?

18. In groups
Complete the tangram in groups! A tangram is a puzzle create by the Chinese in about This is a review of evaluating expressions!!!

19. Homework
2.4