Maths with David

    3 April

    👉🏼Solve 3(x-2) + 2(x+8) = x+6

    👈🏼x:y = 2:5. Write down a formula for x in terms of y

    🖐🏼Calculate 81^{ \frac{3}{2}}

    👆🏼Write \frac{x}{x-1} + \frac{4x}{x+5} as a single fraction.

    👇🏼Given that f(x) = \frac{2x+1}{5} , find f-1(4)

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