4MA0 Foundation January 2016 Paper 1 Q18
18 Solve \(3(2x + 5) = 4 - x\)
Show clear algebraic working.
(3)
| Scheme | Marks |
|---|---|
| \(6x + 15\) | M1 |
| \(6x + x = 4 - 15\) | M1 |
| \(-1\dfrac{4}{7}\) oe | A1 |
| (3) |
Notes
M1: for correct expansion of bracket OR division of all terms in a correct equation by 3
M1: for correct rearrangement within a correct equation with \(x\) terms on one side and numbers on the other
A1: Award full marks for a correct answer if at least 1 method mark awarded (allow \(-\dfrac{11}{7}\) as final answer)
accept −1.57(1428...)