e.g. \(-6y - 2y = -7 - 3\) or \(3 + 7 = 2y + 6y\) or \(-8y = -10\) or \(8y = 10\)
M1
1.25 oe
A1
(3)
Notes
M1: for multiplying out brackets in a correct equation or dividing all terms by 3
M1: for isolating the terms in \(y\) ft from \(3 - 2y = 2y - 7\) or \(1 - 6y = 2y - 7\)
A1: dep on M1 awarded
Mark scheme (b)
Scheme
Marks
\(-3 \lt x \leqslant 4\)
B2
(2)
Notes
B2: also accept \(x > -3\) and \(x \leqslant 4\) or \(4 \geqslant x > -3\) If not B2 then award B1 for a double-ended inequality which is correct at one end (ignore the other end) eg. \(-3 \lt x \lt 4\), \(-3 \leqslant x \leqslant 4\), \(-3 \lt x > 4\) or for an answer of \(x > -3\) oe or \(x \leqslant 4\) oe
or the wrong variable in an otherwise correct inequality eg. \(-3 \lt y \leqslant 4\)
SC : Award B1 for \(-3 \leqslant x \lt 4\)
Mark scheme (c)
Scheme
Marks
e.g. \(2m \geqslant 8 - 13\)
M1
\(m \geqslant -2.5\) oe
A1
(2)
Notes
M1: for isolating terms in \(m\) (in an equation or inequality) e.g. \(2m \geqslant -5\) or −2.5 oe
