2.3 solving multi-step equations

Review combining like terms Term-- the individual item(s) being added or subtracted. Example: 3x + 5x Example: 5y – 7 + 3y Example: 2x + 8y – 7x – 3y 8x 8y x + 5y 2x – 7x + 8y - 3y

17x – x = 55 17x + 9x - 23 = 55 26x - 23 = = x = x = 3

45x x = x -17x +21 = x +21 = = x = = 28 x = -3 45x x = -63

-22x x = x + 45x + 22 = x + 22 = = x = x = 9

27x + 19 – 39x = x – 39x + 19 = x + 19 = = x = = -12 x = 7

Distributive property review 3(x + 2)=3x (3x + 7)=-12x (2x - 9)= -6x + 27

4(2x + 7) = 108 4(2x) + 4(7) = 108 8x + 28 = = -28 8x = x = 10

-7 (3x -1) = x -7 (3x -1) = = 91-21x+7 = x = x = -4

x + 5(x -1) = 7 6x - 5 = x = 12 6 x = 2 x + 5(x -1) = 7 x + 5x x + 5x - 5 = 7

Assignment (section 2.3) Book pg 98: 10-19, 25-32, evens, 72-80