Identifying Mistakes Directions: Identify the mistake within the problem and then make the appropriate corrections. Problem Correction 2(3x 4) + 12 3x = 5x + 20 – – 6x 8 + 12 3x = 5x + 20 – – 6x 3x 8 + 12 = 5x + 20 – – 3x + 4 = 5x + 20 +3x +3x 4 = 8x + 20 -20 -20 -16 = 8x -16(1/8) = 8x(1/8) -2 = x 12x 8 7x = 7 (2x + 6) – – – 5x 8 = 7 2x + 6 – – 5x 8 = 13 2x – – +2x +2x 7x 8 = 13 – + 8 +8 7x = 21 7 7 x = 3 and Kayla both solved the problem below. Who solved it correctly? Identify the mistake for the person who solved it incorrectly. Kayla 5x 15 3x = 10 (-3x + 20) 5x 15 3x = 10 (-3x + 20) – – – – – – 2x 15 = 10 + 3x 20 2x 15 = 10 + 3x 20 – – – – 2x 15 = - 10 + 3x 2x 15 = - 10 + 3x – – -3x - 3x +3x + 3x -1x - 15 = -10 5x - 15 = -10 + 15 +15 +15 +15 -1x = 5 5x = 5 x = -5 x = 1
Identifying Mistakes Directions: Identify the mistake within the problem and then make the appropriate corrections. Problem Correction 2(3x – 4) + 12 – 3x = 5x + 20 6x – 8 + 12 – 3x = 5x + 20 6x – 3x – 8 + 12 = 5x + 20 3x + 4 = 5x + 20 +3x +3x 4 = 8x + 20 -20 -20 -16 = 8x -16(1/8) = 8x(1/8) -2 = x 12x – 8 – 7x = 7 – (2x + 6) 5x – 8 = 7 – 2x + 6 5x – 8 = 13 – 2x +2x +2x 7x – 8 = 13 + 8 +8 7x = 21 7 7 x = 3 and Kayla both solved the problem below. Who solved it correctly? Identify the mistake for the person who solved it incorrectly. Kayla 5x – 15 – 3x = 10 – (-3x + 20) 5x – 15 – 3x = 10 – (-3x + 20) 2x – 15 = 10 + 3x – 20 2x – 15 = 10 + 3x – 20 2x – 15 = - 10 + 3x 2x – 15 = - 10 + 3x -3x - 3x +3x + 3x -1x - 15 = -10 5x - 15 = -10 + 15 +15 +15 +15 -1x = 5 5x = 5 x = -5 x = 1
mip-a-4ae-prog-equations.docx