If (0.04)² ÷ (0.008) × (0.2)⁶ = (0.2)ʸ, then find y.

If (0.064)(0.4)^7=(0.4)^x(0.0256)^2, find (x⁻¹−1)/(x−1).

Find the value of x, if 3⁴ × 3ˣ = 3⁸:

If 2x − 3y = 12 and x/y = 3/4, find x and y

Find the value of: [(0.05)² + (0.41)² + (0.073)²] / [(0.005)² + (0.041)² + (0.0073)²]

If x is the largest and y is the lowest among ∜6, √2 and ∛4, then (x³+y²)/(x³−y²) is