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and if x = 4 then
Penny Hello Richard. I can't quite answer your question because you haven't said what the "given" value of x is. These questions are usually worded more like this: In this case, the answer would be 7 because 5 times 2 minus 3 is 7. You put the given value of x in place of x and do the calculation. or What is the value of the function y = 5 x  3 for the following given In this other case, there are three answers: one for each value of x. Try it with 7 in place of x and you get 5 times 7 minus 3 is 32; with x = 1, the value of the function is 2; with x = 4, the value of the function is 17. Check the wording carefully to see what it is asking and what value(s) of x are given to you. Hope this helps,  


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