Solve 0.7cos(x)-sin(x)=r for x where r is a real number show all steps (if you don't show steps, i'll report the answer)

Try this solution (see the attachment), note:

1. the word 'ctgx' means 'cotangens x'; 2. this equation has roots not for all the real number 'r', it is shown in the 2-d line of the answer; 3. the answer is marked with red colour.

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step-by-step explanation:

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720 oranges were in the shipment.