Question 10285
the "letter" is the "unknown" in an equation. It is the thing you are trying to find the value(s) of.


Evaluate means work out, eg Evaluate 3(2x-5) when x=4, gives 3(2(4)-5), which is 3(8-5), which is 3(3) which is 9.


Simplify means just that, eg Simplify 3x-4y+2x-5xy gives 5x-4y-5xy

Solve means find the "roots" of the given equation. This is any points that satisfy y=0. In other words, find the value(s) of x where the equation crosses the x-axis.


jon.