Presentation Transcript
Lesson 3: Multi-Step Equations :Lesson 3: Multi-Step Equations
Slide 2:EX 9x +x -7 = 13 10x – 7 = 13 +7 +7 10x = 20 10 10 x = 2
Slide 3:EX 2(x – 3) = 20 2(x) – 2(3) = 20 2x – 6 = 20 +6 +6 2x = 26 2 2 x = 13
Slide 4:EX 4(y + 8) - 7 = 15 4(y) + 4(8) - 7 = 15 4y + 32 - 7 = 15 -25 -25 4y = -10 4 4 4y + 25 = 15
Slide 5:EX 4c + 3(c - 2) = -34 4c + 3(c) +3(-2) = -34 4c + 3c - 6 = -34 +6 +6 7c = -28 7 7 7c - 6 = -34 c = -4
Slide 6:EX 2 (2) 3(x – 2) = 42 3(x) – 3(2) = 42 3x – 6 = 42 +6 +6 3x = 48 3 3 x = 16
Slide 7:EX You are fencing a rectangle garden with 25 ft of fence. The side of the garden against your house does not need a fence. This side is 9ft long. Find the dimensions of the garden. House 9 ft width width width + 9 ft + width = 25 ft let w = width w + 9 + w = 25 2w + 9 = 25 -9 -9 2w = 16 2 2 w = 8 The garden is 8ft by 9ft.