 Solve each equation; show each step. 8y = 96-28 = d – (-15) The population of Austin is 900,000. This is about 6 times the population of Houston. What.

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Presentation transcript:

 Solve each equation; show each step. 8y = = d – (-15) The population of Austin is 900,000. This is about 6 times the population of Houston. What is the population of Houston? 88 y = 12 Check: 8 * 12 = = d = d Check: -43 – (-15) = ,000 = 6 x x=150,000

Two Step Equations

 Addition Property of Equality:  Subtraction Property of Equality:  Multiplication Property of Equality:  Division Property of Equality:  Distributive Property: For any numbers A, B, and C, if A=B, then A+C=B+C For any numbers A, B, and C, if A=B, then A-C=B-C For any numbers A, B, and C, if A=B, then AC=BC For any numbers A, B, and C, if A=B, then A÷C=B÷C For any numbers A, B, and C, A(B+C) = AB + AC

15 = -4x = -4x = x Check: -4(-5) – 5= 15

 We are “un-doing” the equation ◦ Opposite of order of operations! ◦ Just like taking off your shoes!  Just remember: we need to balance the equation! ◦ t_2.html t_2.html

 5k – 10 = k = k = 7 Check: 5(7) – 10 = 25

-60 = 4 (x – 5) -60 = 4x = = 4x = x Check: 4(-10 – 5) = -60

 Extra Practice 4.3  the Odd problems!