Answer:
-12
Step-by-step explanation: Since, -x= -7, -7-5= -12( because seven is a negative integer and the equation states that -7 and 5 has to be subtracted, according to various expressions like -1-1 the answer is given that it is -2 if 7 had been a positive integer, then, 7-5=2 as when a positive and negative integer is subtracted, we give the answer either +ve or -ve influenced by the sign of the greater number) Sorry........ i just noticed that the qstn had mentioned x and not -x, but since it has to be fair in answering, i'll leave the answer as how it was...... once again sorry