Which sentence in the letter has an error? send me an application for employment. i am interested in the machine operator position that have been advertised. i have worked in a similar job before. you for your assistance.

I'm certain that "have should be had." I am interested in the machine operator position that HAD been advertised. I would also say that 'I have worked in a similar job before' is a run-on sentence and should look like this. I am interested in the machine operator position that have been advertised, I have worked in a similar job before.

Hope this helps!

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substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4

answer: x = 4 and y = 4