Unit 2: Day 4 – 1 step equations

Warm-up Write an equation to model the situation. The total cost of n cartons of milk is $3.60. Each carton costs $0.45. Simplify: 2. 6t + 2 – 4t + 5

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

23. T = 7n, t = total cost, n = # of tickets 24 23. T = 7n, t = total cost, n = # of tickets 24. 55h = D, h = # of hours, D= distance traveled 25. 5h=p, h=# of hours, p = pay 26. 0.45d=L, d=# of days, L=length

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?

“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!”

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.

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

Solving Equations (finding equivalent equations) Use INVERSE OPERTATIONS : operations that undo each other EX 1. 8 + x = 5

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

Create an equivalent Equation: N – 3 = 5 2. d + 5 = 7 3. 4 + x = 8

4) A + 6 = 13 5) x – 12 = 24 5) -2 + x = 10 6) 15 = a + 4.2

Solve 5x = 25 2. 30 = 2v 3. 4.

5. 6.

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?

In groups Complete the tangram in groups! A tangram is a puzzle create by the Chinese in about 1800. This is a review of evaluating expressions!!!

Homework 2.4