Learn Russian: Мягкий хлеб вкусный.

Both are masculine adjectives describing the masculine noun хлеб (bread), so they need a masculine ending. The standard ending is -ый, as in вкусный. However, Russian has a spelling rule: after the letters к, г, and х, you can never write the letter ы. You must write и instead. Because the stem of мягкий ends in к, it has to take the -ий ending.

How is the word мягкий pronounced? It sounds like there is a х in the middle.

You heard it right! The letter г in мягкий is an exception to the normal pronunciation rules. It is pronounced like a Russian х (a breathy 'kh' sound). So, it sounds exactly like 'мяхкий'. This same exception happens in the word лёгкий (easy or light).

Both мягкий (soft) and вкусный (tasty) are adjectives. Why is one before the noun and one after?

Мягкий is an attributive adjective, meaning it directly describes the noun it sits next to to form the phrase 'soft bread'. Вкусный is being used to state a fact about that bread. In English, we separate them with the verb 'is' (Soft bread IS tasty). In Russian, because the word 'is' is dropped in the present tense, just placing the adjective after the noun shows that it is the main point of the sentence.

Where is the word for 'is' in this sentence?