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These equations would best be solved using the substitution method, in this case the easiest way would be substituting x. For the first equation we need to rearrange it to get x on one side so we have x=2...

Ran through the 3 different types of GCSE equations

Ammonia is based off a tetrahedral shape, the central Nitrogen atom has 4 valence (outer) pairs of electrons, 3 in covalent bonds with Hydrogen atoms and one "lone pair" which are not bonded. Th...

A catalyst refers to many types of different molecules or chemicals which can reduce the activation energy of a reaction without being used up itself. Activation energy is the minimum ene...

This is a common and understandable mistake that is made since essentially both of these processes refer to molecules being moved out of the cytoplasm of a cell using energy. There is however a major diff...