Given
92x+127y−1=81 \frac{9^{2x+1}}{27^{y-1}} = 81 27y−192x+1=81express y y\,y in terms of xxx, writing your answer in its simplest form.
134 exam-style questions on Edexcel AS Level Maths Algebraic Expressions, covering 1.1 Index Laws, 1.2 Expanding Brackets, 1.3 Factorising, 1.4 Negative and Fractional Indices, and 1.5 Surds. Each one has a worked solution and a mark scheme showing where the marks go.