9(3 + = 4 × 5 M1 3 + 4 × x) x = 3 + x = 27 + 9x = 20 M1dep x = 3 – 9x = 20 27 M1dep – or or – –0.77... –0.78 A1 oe Alternative Method 2 3 + x = 9 × 4(3 + = 5 × 9 M1 x) 3 + x = 12 + 4x = 45 x = 3 – 4x = 45 12 M1dep – or 8.25 A1 oe Alternative Method 3 3 + x = 5 × 4(3 + = 5 × 9 M1 x) 3 + x = 12 + 4x = 45 M1dep x = 3 – 4x = 45 12 M1dep – or 8.25 A1 oe
9(3 + x) = 4 × 5 M1 3 + x = 4 × 27 + 9x = 20 M1dep 3 + x = 9x = 20 – 27 M1dep x = – 3 – or –0.77... or –0.78 A1 oe Alternative Method 2 4(3 + x) = 5 × 9 M1 3 + x = 9 × 12 + 4x = 45 3 + x = 4x = 45 – 12 M1dep x = – 3 or 8.25 A1 oe Alternative Method 3 4(3 + x) = 5 × 9 M1 3 + x = 5 × 12 + 4x = 45 M1dep 3 + x = 4x = 45 – 12 M1dep x = – 3 or 8.25 A1 oe
November-2014-Paper-2-Mark-Scheme1.docx