You should use algebra in all parts of this question, showing your working clearly. (a) Solve the following equations, giving your answers as integers or as fractions in their simplest form. (i) 7a + 19 = 21 – 3x (ii) 14 – (9x – 2) = 7 + 3r 20 = 1 x + 2 x + 8 (b) Factorise the expression r? +13x – 68, and hence solve the equation x? + 13x – 68 = 0. (c) A student was asked to rearrange the formula d – 2c(6 – d) 10a 7 to make d the subject (assuming that 1+ 14c + 0). The student's incorrect attempt is shown below. 10 a =-206-d) Clear the fractions By multiplyinG By 7 10 a =d-20lb-d) Multiply out the Bracket 10 a = d-12c-2cd

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