21 In this question, all lengths are in centimetres. 2x − 1 2x + 1 9 NOT TO x SCALE x + 3 The perimeter of the triangle is equal to the perimeter of the rectangle. Form an equation and solve it to find the value of x. x = ................................................. [4] h M SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM