If 20% of x is 25 then find x​

Choose the inventions of the baroque era. eyeglasses mercury barometer harvester microscope pressure cooker printing press slide rule

1× 10×10×10+2×30×30=[tex]1 \times 10(4) + 2 \times 10(3) = \\ [/tex]

Atypical scale usually consists of one of pitches. 1. rhythm 2. octave 3. key 4. series