If x = log₁₀12, y = log₄2 × log₁₀9 and z = log₁₀0.4, find the values of

(i) x - y - z

(ii) 7^{x - y - z}

Given 3(log 5 - log 3) - (log 5 - 2log 6) = 2 - log n, find n.

Given that log₁₀y + 2log₁₀x = 2, express y in terms of x.