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To solve the equation means to make x the subject i.e. to make x on its own. Therefore, we need to add 6. If you add 6 to one side you must also add 6 to the other side. x-6+6 = 15+6 x = 21 So x=21.

Genetic conditions can be passed on from parent to offspring in a number of different 'patterns;' these are the modes of inheritance. In autosomal dominant conditions, only one mutated copy of the gene is re...

Direct object pronouns take the place of nouns in writing. We use them to stop repeating ourselves. For example: I have a book . I give the book to Juan and he reads the book . Tengo un libro. Doy el libro a...

To form the perfect tense, you need two parts. The first part is known as the auxillary verb, which is either avere or essere. The second part is known as the past participle. So to say "I bought" ...

Latin has a major flaw compared to English: it doesn't like having two 'main verbs' in the same sentence/clause if it can be avoided. Therefore, you have to put one of the verbs into participle form. So you ...