Most lakes were formed from melting glaciers shrinking oceans volcanic eruptions excessive precipitation

most lakes were formed from : melting glaciers When glaciers melt, the ice that cover it will started to turn into liquid. The force of Gravity will bring this liquid onto the holes on the surface of earth and filling it with water, which is the lakes that we are commonly see

Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].

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