4MA0 Foundation January 2015 Paper 1 Q15
15
(a) Solve \(3x + 5 = 26\)
Show clear algebraic working. (2)
Show clear algebraic working. (2)
(b) Solve \(4(5y - 1) = 3(6y + 7)\)
Show clear algebraic working. (3)
Show clear algebraic working. (3)
| Scheme | Marks |
|---|---|
| Eg \(3x = 21\) or \(3x = 26 - 5\) or \(-3x = -21\) or \(3x - 21 = 0\) or \(21 - 3x = 0\) or \((26 - 5) \div 3\) | M1 |
| 7 | A1 |
| (2) |
| Scheme | Marks |
|---|---|
| \(20y - 4 = 18y + 21\) | M1 |
| Eg \(20y - 18y = 21 + 4\) or \(2y = 25\) | M1 |
| \(12\frac{1}{2}\) | A1 |
| (3) | |
| (5 marks) |
Notes
M1: for \(20y - 4\) or \(18y + 21\)
M1: For a correct equation with the \(y\) terms collected on one side of the equation and the non \(y\) terms on the other side.
A1: oe dep on at least M1