4MA0 Foundation January 2013 Paper 1 Q10
10
(a) Solve \(\quad 6x + 5 = 20\)
Show clear algebraic working. (2)
Show clear algebraic working. (2)
(b) Solve \(\quad 4(2y - 5) = 30\)
Show clear algebraic working. (3)
Show clear algebraic working. (3)
| Scheme | Marks |
|---|---|
| \(6x = 20 - 5\) or \(6x = 15\) or \((20 - 5) \div 6\) | M1 |
| 2.5 oe | A1 |
| (2) |
Notes
M1: Brackets not necessary
A1: Correct answer with no working = M1A1
sc M1 A0 for 19.16 or better.
| Scheme | Marks |
|---|---|
| \(8y - 20 = 30\) or \(2y - 5 = 30 \div 4\) | M1 |
| \(8y = 20 + 30\) or \(2y = (30 \div 4) + 5\) | M1 |
| 6.25 oe | A1 |
| (3) |
Notes
M1: M1 for \(8y - 20\)
A1: dep on M1 awarded otherwise M0A0