c + c - 14a + 15bm - 13a - 17bm=?
c + c - 14a + 15bm - 13a - 17bmrearrangec + c - 14a - 13a + 15bm - 17bmcombine like terms2c - 27a - 2bmAnd got my Math paper 4 IGCSE external tomorrow, thanks for posting this question that helped me more!