<PRE><B>Question 65674</B>
QUESTION:

what is the difference between 
3(x –1) + 4 – 2x
3(x-1) +4 = 2x  



ANSWER:


3(x –1) + 4 – 2x is an expression 


and 3(x-1) +4 = 2x  is an equation. 



An expression is a combination of numbers, operators, grouping symbols (such as brackets and parentheses) and/or free variables and bound variables arranged in a meaningful way which can be evaluated.





An expression which includes an equal sign is called an equation.



Otherwise we can define,



An equation is a mathematical statement, in symbols, that two things are the 


same (or equivalent). Equations are written with an equal sign, as in

2 + 3 = 5. 







Hope you understood.



Regards.




Praseena.




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