67, ronaldo, In a test Arun scored 3 marks fewer than Sofi a. Sofi a scores x marks and Arun scores y marks, y = 3x, y = x - 3, y = 3 - x, The length of a rectangle is four times its width.The width is w cm and the length is l cm. Write down a function that gives l in terms of w., l = 4w, l = 4 + w, w = 4l, The price of a train ticket is $12 more than the price of a bus ticket . If the price of the train ticket is $t, write a function for t., t = b + 12, t = 12b, t = b - 12, Zara’s mass is half the mass of Sofi a Sofi a is x kg and Zara is y kg. Write a formula for y in terms of x., y = x4, y = x/4, y = 4x, Twenty books cost $340 .Work out a function for the cost, c, in dollars, of n books., c = 12n, c = 17n, c = 17 +n
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