Linear equations

Hi, I would like to ask someone if he would help us calculate this with the exam :-) We count it over and over again, in several ways and still and not work out for us :-) Thank you very much for the efforts of others who will try to help us. Thanks in advance :-)
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Answer :

in the equation the number moved to the other side of the equation changes its value to the opposite, which means: a positive number moved to the other side of the equation changes its value to a negative number and negative to positive if I count the integer and fractions, I have to adjust the numbers and fractions for fractions with the same denominator, it is already simple ... the example of ´d´ is similar     
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