Foundation November 2018 Paper 1 Q20
20 Solve \(\quad 3x - 8 = 19\) [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| Alternative method 1 | ||
| \(3x = 19 + 8\) or \(3x = 27\) or \((19 + 8) \div 3\) or \(\dfrac{27}{3}\) | M1 | accept in ‘flow chart’ eg \((x \rightarrow) \times 3 \rightarrow -8 \rightarrow 19\) and \(\leftarrow \div 3 \leftarrow +8 \leftarrow 19\) enough for M1 |
| 9 | A1 | |
| Alternative method 2 | ||
| \(x - \dfrac{8}{3} = \dfrac{19}{3}\) | M1 | |
| 9 | A1 | |
Additional guidance
| \(3 \times 9 - 8\ (= 19)\) | M1A0 |