Solve the equation: 3x - 7 = 11., Calculate: 2/5 + 1/3. Give your answer as a single fraction., Simplify the ratio 18: 30 to its simplest form., A bag contains red and blue marbles in the ratio 5: 3. What fraction of the marbles are blue?, Expand and simplify the expression: 4(2y - 5) + 3y., Convert the mixed number 3 1/4 into an improper fraction., Write 0.85 as a fraction in its simplest form and as a percentage., A student scored 60% on a test. Express this as a fraction in its simplest form and as a decimal.

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